| Bacteria | | Actinobacteria [phylum] | Clavibacter michiganensis subsp. michiganensis (bacterial canker of tomato) | Absent, formerly present | | | Bradbury, 1986; CABI/EPPO, 2009; EPPO, 2014 |
| Bacteria | | Actinobacteria [phylum] | Clavibacter michiganensis subsp. sepedonicus (Potato ring rot) | Eradicated | | | EPPO, 2014 |
| Bacteria | | Actinobacteria [phylum] | Dermatophilus congolensis | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Bacteria | | Actinobacteria [phylum] | Mycobacterium avium subspecies paratuberculosis | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Bacteria | | Actinobacteria [phylum] | Mycobacterium bovis | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Bacteria | | Bacteroidetes | Paenibacillus larvae | Present | | | OIE, 2009 |
| Bacteria | | Firmicutes | Bacillus anthracis | Last reported 2002 | | | OIE Handistatus, 2005 |
| Bacteria | | Firmicutes | Candidatus Phytoplasma asteris (yellow disease phytoplasmas) | Present | | | Nisbet et al., 2014; Vibio et al., 1996; Keane et al., 1996; Reeder & Arocha, 2008; EPPO, 2014 |
| Bacteria | | Firmicutes | Grapevine flavescence doree phytoplasma (flavescence dorée of grapevine) | Absent, no pest record | | | EPPO, 2014 |
| Bacteria | | Firmicutes | Melissococcus plutonius | Present | | | Budge et al., 2010; OIE, 2009 |
| Bacteria | | Firmicutes | Mycoplasma capricolum subsp. capripneumoniae | Disease never reported | | | OIE Handistatus, 2005 |
| Bacteria | | Firmicutes | Mycoplasma gallisepticum | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Bacteria | | Firmicutes | Mycoplasma mycoides subsp. mycoides small colony (SC) type | Last reported 1898 | | | OIE Handistatus, 2005 |
| Bacteria | | Firmicutes | Phytoplasma mali (apple proliferation) | Eradicated | | | EPPO, 2014; CABI/EPPO, 2013 |
| Bacteria | | Firmicutes | Phytoplasma prunorum (apricot chlorotic leafroll) | Restricted distribution | | | EPPO, 2014 |
| Bacteria | | Firmicutes | Phytoplasma pyri (pear decline) | Restricted distribution | | | EPPO, 2014; CABI/EPPO, 2013 |
| Bacteria | | Proteobacteria | Brenneria salicis (watermark) | Restricted distribution | | | Day, 1924; EPPO, 2014 |
| Bacteria | | Proteobacteria | Brucella ovis | Disease never reported | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Brucella suis | Disease never reported | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Burkholderia caryophylli (bacterial wilt of carnation) | Absent, formerly present | | | EPPO, 2014 |
| Bacteria | | Proteobacteria | Burkholderia pseudomallei | Disease not reported | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Campylobacter fetus subsp. venerealis | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Candidatus Liberibacter solanacearum (zebra chip) | Present | | | Monger & Jeffries, 2016 |
| Bacteria | | Proteobacteria | Coxiella burnetii | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Dickeya solani (black leg disease of potato) | Restricted distribution | Introduced | | Toth et al., 2011; Elphinstone, 2012; Cahill et al., 2010; CABI/EPPO, 2015 |
| Bacteria | | Proteobacteria | Ehrlichia ruminantium | No information available | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Erwinia amylovora (fireblight) | Restricted distribution | Introduced | Yes | Stead, 1987; Crosse et al., 1958; Lelliott, 1968; Glasscock, 1969; EPPO, 2014; CABI/EPPO, 2013 |
| Bacteria | | Proteobacteria | Escherichia coli | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Bacteria | | Proteobacteria | Francisella tularensis | Disease not reported | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Mannheimia haemolytica | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Bacteria | | Proteobacteria | Pseudomonas savastanoi pv. savastanoi (oleander knot) | Widespread | | Yes | Bradbury, 1986; CMI, 1987 |
| Bacteria | | Proteobacteria | Ralstonia solanacearum (bacterial wilt of potato) | Transient: actionable, under eradication | | | IPPC, 2010; EPPO, 2014 |
| Bacteria | | Proteobacteria | Salmonella abortusovis | Disease not reported | | | OIE, 2009 |
| Bacteria | | Proteobacteria | Salmonella gallinarum | Last reported 1986 | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Salmonella pullorum | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Taylorella equigenitalis | Last reported 2003 | | | OIE Handistatus, 2005 |
| Bacteria | | Proteobacteria | Xanthomonas axonopodis pv. phaseoli (bean blight) | Absent, no pest record | | | EPPO, 2014 |
| Bacteria | | Proteobacteria | Xanthomonas fragariae (angular leaf spot) | Eradicated | | | EPPO, 2014; CABI/EPPO, 2013 |
| Eukaryota | Chromista | Bacillariophyta | Didymosphenia geminata (didymo) | Widespread | Native | | Brun, 1965; Cleve, 1896; Dawson, 1973a; Dawson, 1973b; McCall, 1932; Meister, 1913; Whitton & Crisp, 1984; Ellwood & Whitton, 2007 |
| Eukaryota | Chromista | Oomycota | Aphanomyces astaci | Widespread | Introduced | Yes | Alderman et al., 1984 |
| Eukaryota | Chromista | Oomycota | Phytophthora cambivora (root rot of forest trees) | Restricted distribution | | | Day, 1938; EPPO, 2009; CABI/EPPO, 2013 |
| Eukaryota | Chromista | Oomycota | Phytophthora cinnamomi (Phytophthora dieback) | Widespread | | | EPPO, 2014 |
| Eukaryota | Chromista | Oomycota | Phytophthora infestans (Phytophthora blight) | Present | | | CMI, 1982 |
| Eukaryota | Chromista | Oomycota | Phytophthora kernoviae | Restricted distribution | | | EPPO, 2014; CABI/EPPO, 2008 |
| Eukaryota | Chromista | Oomycota | Phytophthora lateralis (Port-Orford-cedar root disease) | Localised | Introduced | Yes | IPPC, 2011a; IPPC, 2011b; EPPO, 2011; Forestry Comission, 2013; CABI/EPPO, 2012; EPPO, 2014; Green et al., 2013; Schlenzig et al., 2014 |
| Eukaryota | Chromista | Oomycota | Phytophthora ramorum (sudden oak death (SOD)) | Restricted distribution | | | Brasier & Webber, 2012; EPPO, 2014; CABI/EPPO, 2013; King et al., 2015 |
| Eukaryota | Chromista | Oomycota | Plasmopara halstedii (downy mildew of sunflower) | Transient: actionable, under eradication | | | EPPO, 2014; IPPC, 2010; CABI/EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Alternaria japonica (pod spot of radish) | Present | | | Moore, 1959; CABI/EPPO, 2002; Ware, 1936 |
| Eukaryota | Fungi | Ascomycota | Apiognomonia errabunda (anthracnose) | Present | | | Moore, 1959; Sutton, 1980; Toti et al., 1992; Phillips & Burdekin, 1992 |
| Eukaryota | Fungi | Ascomycota | Blumeria graminis (powdery mildew of grasses and cereals) | Present | | | O'Hara & Brown, 1996; Higginbotham et al., 1996; CABI/EPPO, 2004 |
| Eukaryota | Fungi | Ascomycota | Botryotinia porri (Botrytis rot of garlic) | Widespread | | | Cook, 1976; Cronshey, 1947; IMI Herbarium unda |
| Eukaryota | Fungi | Ascomycota | Calonectria pseudonaviculata (Buxus blight) | Widespread | Introduced | Yes | Henricot et al., 2000; Henricot & Culham, 2002; CABI/EPPO, 2012; EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Ceratocystis fimbriata (Ceratocystis blight) | Absent, reported but not confirmed | | | IMI Herbarium unda; EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Ceratocystis platani (canker stain of plane) | Absent, no pest record | | | EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Ciborinia camelliae (flower blight) | Restricted distribution | | | Cook, 1999; Scott, 1999; EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Colletotrichum acutatum (black spot of strawberry) | Restricted distribution | | | EPPO, 2014; CABI/EPPO, 2010; Baroncelli et al., 2014 |
| Eukaryota | Fungi | Ascomycota | Crumenulopsis sororia | Present | | | Hayes, 1973; Ennos & McConnell, 2003 |
| Eukaryota | Fungi | Ascomycota | Cryphonectria parasitica (blight of chestnut) | Transient: actionable, under eradication | | | IPPC, 2012; EPPO, 2014; Hunter et al., 2013; CABI/EPPO, 2015 |
| Eukaryota | Fungi | Ascomycota | Didymascella thujina (cedar leaf blight) | Restricted distribution | Introduced | Yes | Boyce, 1927; Alcock, 1928; Laing, 1929; Loder, 1919; Miles, 1922 |
| Eukaryota | Fungi | Ascomycota | Didymella fabae (leaf and pod spot) | Present | Introduced | Yes | Beaumont, 1950; Bond & Pope, 1980; Jellis & Punithalingam, 1991 |
| Eukaryota | Fungi | Ascomycota | Discula destructiva (anthracnose of dogwood) | Absent, intercepted only | | | CABI/EPPO, 2004; EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Gibberella circinata (pitch canker) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Gremmeniella abietina (Brunchorstia disease) | Restricted distribution | | | UK CAB International, 1989; EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Hymenoscyphus fraxineus (ash dieback) | Transient: actionable, under eradication | | | EPPO, 2014; Forestry Commission, 2012; CABI/EPPO, 2013 |
| Eukaryota | Fungi | Ascomycota | Kabatiella zeae (eyespot) | Present | | | Anon, 2009 |
| Eukaryota | Fungi | Ascomycota | Lachnellula willkommii (European larch canker) | Widespread | | | EPPO, 2014; Spaulding, 1961; Dennis, 1986 |
| Eukaryota | Fungi | Ascomycota | Leptographium procerum (white pine root decline) | Present | | | Wingfield & Gibbs, 1991 |
| Eukaryota | Fungi | Ascomycota | Monilinia fructigena (brown rot) | Widespread | Introduced | Yes | CABI/EPPO, 2000; EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Mycosphaerella dearnessii (brown spot needle blight) | Absent, intercepted only | | | EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Mycosphaerella pini (Dothistroma blight) | Restricted distribution | | | CABI/EPPO, 2010; EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Ophiostoma novo-ulmi (Dutch elm disease) | Widespread | Introduced | Yes | Gibbs, 1978 |
| Eukaryota | Fungi | Ascomycota | Ophiostoma ulmi (Dutch elm disease) | Restricted distribution | Introduced | Yes | Stipes et al., 1981; EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Phoma tracheiphila (mal secco) | Absent, no pest record | | | EPPO, 2014 |
| Eukaryota | Fungi | Ascomycota | Phyllactinia guttata (powdery mildew of hardwood trees) | Present | | | Braun, 1995 |
| Eukaryota | Fungi | Ascomycota | Pseudogymnoascus destructans (white-nose syndrome fungus) | Present | | | Barlow et al., 2015 |
| Eukaryota | Fungi | Ascomycota | Seiridium cardinale (cypress canker) | Present | Introduced | | Strouts, 1970; Strouts, 1973; Strouts, 1982; Strouts, 1988; Sánchez & Gibbs, 1995; EPPO, 2014; CABI/EPPO, 2014; Herb. IMI, 1969; Herb. IMI, 1971; Herb. IMI, 1983; Herb. IMI, 1984 |
| Eukaryota | Fungi | Ascomycota | Sphaeropsis sapinea (Sphaeropsis blight) | Present | | | Sutton, 1980; Strouts et al., 1985; IMI Herbarium unda; Moor, 1959 |
| Eukaryota | Fungi | Basidiomycota | Amylostereum areolatum | Present | Native | | UK CAB International, 2009 |
| Eukaryota | Fungi | Basidiomycota | Chrysomyxa rhododendri (European Rhododendron rust) | Localised | Introduced | Yes | Grove, 1913; Bennell, 1985; Dennis & Foister, 1942; CABI/EPPO, 2012 |
| Eukaryota | Fungi | Basidiomycota | Cronartium ribicola (white pine blister rust) | Restricted distribution | | | CABI/EPPO, 2000; Spaulding, 1961; IMI Herbarium unda; EPPO, 2014 |
| Eukaryota | Fungi | Basidiomycota | Heterobasidion annosum | Widespread | Native | | |
| Eukaryota | Fungi | Basidiomycota | Heterobasidion annosum sensu lato (Heterobasidion root rot) | Restricted distribution | Native | | EPPO, 2014 |
| Eukaryota | Fungi | Basidiomycota | Puccinia buxi | Widespread | | | Dennis, 1995; Foister, 1961; Grove, 1913; Dennis, 1986 |
| Eukaryota | Fungi | Basidiomycota | Puccinia graminis (stem rust of cereals) | Present, few occurrences | | | Ogilvie & Thorpe, 1966; Priestley, 1980 |
| Eukaryota | Fungi | Basidiomycota | Puccinia horiana (white rust of chrysanthemum) | Restricted distribution | | | CABI/EPPO, 2008; EPPO, 2014 |
| Eukaryota | Fungi | Basidiomycota | Urocystis agropyri (flag smut of wheat) | Present, few occurrences | Introduced | Yes | Sansford et al., 1998; IMI, 1991; UK CAB International, 1991; EPPO, 2014 |
| Eukaryota | Fungi | Chytridiomycota | Batrachochytrium dendrobatidis (Bd) | Present | | | Garner et al., 2006; Cunningham & Minting, 2008 |
| Eukaryota | Fungi | Chytridiomycota | Batrachochytrium salamandrivorans (Bsal) | Absent, intercepted only | Introduced | | Cunningham et al., 2015 |
| Eukaryota | Fungi | Chytridiomycota | Synchytrium endobioticum (wart disease of potato) | Restricted distribution | | | EPPO, 2014; CABI/EPPO, 2015 |
| Eukaryota | Metazoa | Annelida | Alitta succinea (pile worm) | Present | | | ERMS (European Register of Marine Species), 2006 |
| Eukaryota | Metazoa | Annelida | Ficopomatus enigmaticus (tubeworm) | Widespread | Introduced | Yes | Zibrowius & Thorp, 1989; Joyce et al., 2005 |
| Eukaryota | Metazoa | Annelida | Lumbricus rubellus | Present | Introduced | | Gates, 1972 |
| Eukaryota | Metazoa | Annelida | Lumbricus terrestris | Present | Introduced | Yes | Gates, 1972 |
| Eukaryota | Metazoa | Arthropoda | Acarapis woodi (honeybee mite) | Restricted distribution | | | EPPO, 2014; OIE, 2009 |
| Eukaryota | Metazoa | Arthropoda | Acrolepiopsis assectella (leek moth) | Present, few occurrences | | | Dannreuther, 1944; Simmonds, 1974; Jary & Rolfe, 1945; Becker, 1961; CABI/EPPO, 2007; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Aculops fuchsiae (Fuchsia gall mite) | Present, few occurrences | Introduced | | EPPO, 2014; Ostojá-Starzewski et al., 2007; IPPC, 2008; CABI/EPPO, 2009; IPPC, 2015 |
| Eukaryota | Metazoa | Arthropoda | Aculops lycopersici (tomato russet mite) | Present, few occurrences | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Adelges piceae (balsam woolly adelgid) | Present | Introduced | Yes | Busby, 1962; Chrystal, 1925; Carter, 1971; CABI/EPPO, 2012 |
| Eukaryota | Metazoa | Arthropoda | Aedes albopictus (Asian tiger mosquito) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Arthropoda | Agrotis ipsilon (black cutworm) | Widespread | | | Bretherton, 1982; CIE, 1969 |
| Eukaryota | Metazoa | Arthropoda | Aleurocanthus woglumi (citrus blackfly) | Absent, intercepted only | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Aleurothrixus floccosus (woolly whitefly) | Present | | | Malumphy, 1995; EPPO, 2014; CABI/EPPO, 1997 |
| Eukaryota | Metazoa | Arthropoda | Aleurotrachelus atratus (palm-infesting whitefly) | Present only under cover/indoors | Introduced | | Malumphy & Treseder, 2011 |
| Eukaryota | Metazoa | Arthropoda | Amphibalanus improvisus (bay barnacle) | Localised | | Yes | Darwin, 1854; Bassindale, 1964; Minchin & Eno, 2002; Muxagata & Williams, 2011; Rainbow, 1984; Southward, 2008 |
| Eukaryota | Metazoa | Arthropoda | Anoplophora chinensis (black and white citrus longhorn) | Transient: actionable, under eradication | | | ADAS, 1986; CABI/EPPO, 2008; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Anoplophora glabripennis (Asian longhorned beetle) | Present, few occurrences | Introduced | | Forestry Commission, 2012; EPPO, 2014; CABI/EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Aphis craccivora (groundnut aphid) | Restricted distribution | | | CIE, 1983 |
| Eukaryota | Metazoa | Arthropoda | Aphis gossypii (cotton aphid) | Restricted distribution | | | UK CAB International, 1968 |
| Eukaryota | Metazoa | Arthropoda | Aphis spiraecola (Spirea aphid) | Absent, formerly present | Introduced | Yes | Furk, 1979; Martin, 1996; CABI/EPPO, 2001 |
| Eukaryota | Metazoa | Arthropoda | Aromia bungii (red necked longicorn) | Absent, intercepted only | | | EPPO, 2014; Ostojá-Starzewski & Baker, 2012 |
| Eukaryota | Metazoa | Arthropoda | Aulacaspis yasumatsui (cycad aulacaspis scale) | Present only under cover/indoors | Introduced | | Malumphy & Marquart, 2012 |
| Eukaryota | Metazoa | Arthropoda | Austrominius modestus | Widespread | Introduced | Yes | Aitken & Hillis, 1959; Barnes & Barnes, 1960a; Barnes & Barnes, 1961; Barnes & Stone, 1972; Bassindale, 1947; Bassindale, 1958; Bassindale & Barrett, 1957; Bennell, 1981; Bishop, 1947; Boyd, 1973; Briggs, 1982; Connell, 1955; Crisp, 1948; Crisp, 1958; Crisp, 1960; Crisp & Chipperfield, 1948; Crisp & Molesworth, 1951; Crisp & Southward, 1959; Harding, 1948; Herbert et al., 2007; Hiscock, 1986; Hiscock et al., 1978; Hiscock & Moore, 1986; Howson et al., 1994; Jones, 1961; Knight-Jones, 1948; Moyse & Nelson-Smith, 1963; O'Riordan et al., 2009; Powell, 1960; Purchon, 1947; Salman, 1982; Seed & Harris, 1980; Southward, 1953; Southward, 1991; Southward & Crisp, 1956; Stubbings, 1950; Wilkinson et al., 1988; Gomes-Filho et al., 2010 |
| Eukaryota | Metazoa | Arthropoda | Bemisia tabaci (tobacco whitefly) | Present, few occurrences | | | CAB European, 1998; EPPO, 2014; Cuthbertson & Vänninen, 2015 |
| Eukaryota | Metazoa | Arthropoda | Bemisia tabaci (MEAM1) (silverleaf whitefly) | Eradicated | | | Bartlett, 1992; Bedford et al., 1993; EPPO, 2014; Cuthbertson, 2013 |
| Eukaryota | Metazoa | Arthropoda | Bemisia tabaci (MED) (silverleaf whitefly) | Eradicated | | Yes | Powell et al., 2012 |
| Eukaryota | Metazoa | Arthropoda | Blattella germanica (German cockroach) | Present | Introduced | | Alexander et al., 1991 |
| Eukaryota | Metazoa | Arthropoda | Bombus terrestris (bumble bee) | Present | Native | | Rasmont et al., 2008 |
| Eukaryota | Metazoa | Arthropoda | Cacoecimorpha pronubana (carnation tortrix) | Restricted distribution | | | EPPO, 2014; CABI/EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Cacyreus marshalli (pelargonium butterfly) | Absent, formerly present | | | Holloway, 1998; CABI/EPPO, 2001; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Cameraria ohridella (horsechestnut leafminer) | Restricted distribution | Introduced | Yes | RHS, 2002; Tilbury et al., 2004; CABI/EPPO, 2003; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Caprella mutica | Widespread | Introduced | | Cook et al., 2007a |
| Eukaryota | Metazoa | Arthropoda | Carcinus maenas (European shore crab) | Widespread | Native | | Carlton & Cohen, 2003 |
| Eukaryota | Metazoa | Arthropoda | Cerataphis lataniae (palm aphid) | Absent, intercepted only | | | CABI/EPPO, 2007 |
| Eukaryota | Metazoa | Arthropoda | Ceratitis capitata (Mediterranean fruit fly) | Absent, formerly present | Introduced | Yes | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Ceutorhynchus obstrictus (cabbage seed pod weevil) | Widespread | | | Free & Williams, 1978a; Northwood & Verrier, 1986; Colonnelli, 2004 |
| Eukaryota | Metazoa | Arthropoda | Chelicorophium curvispinum (Caspian mud shrimp) | Present | Introduced | | Crawford, 1935; Pygott & Douglas, 1989 |
| Eukaryota | Metazoa | Arthropoda | Cherax quadricarinatus (redclaw crayfish) | Present only under cover/indoors | Introduced | | Souty-Grosset et al., 2006 |
| Eukaryota | Metazoa | Arthropoda | Chrysodeixis chalcites (golden twin-spot moth) | Present, few occurrences | | | Karsholt & Razowski, 1996 |
| Eukaryota | Metazoa | Arthropoda | Cinara cupressi sensu lato (Cypress aphid) | Present | Introduced | Yes | Eastop, 1972; Ciesla, 1991; Watson et al., 1999 |
| Eukaryota | Metazoa | Arthropoda | Coccinella septempunctata (seven-spot ladybird) | Widespread | | | Majerus & Kearns, 1989 |
| Eukaryota | Metazoa | Arthropoda | Cochliomyia hominivorax (New World screwworm) | Disease never reported | | | OIE, 2009 |
| Eukaryota | Metazoa | Arthropoda | Corythucha ciliata (sycamore lace bug) | Restricted distribution | Introduced | Yes | Malumphy Reid, 2006; Malumphy et al., 2007; EPPO, 2014; CABI/EPPO, 2013 |
| Eukaryota | Metazoa | Arthropoda | Crocidosema plebejana (cotton tipworm) | Present | Introduced | Yes | Bradley & et al. , 1979 |
| Eukaryota | Metazoa | Arthropoda | Ctenarytaina eucalypti (blue gum psyllid) | Present | Introduced | Yes | Laing, 1922; Hodkinson, 1999 |
| Eukaryota | Metazoa | Arthropoda | Cydalima perspectalis (box tree moth) | Localised | Introduced | Yes | Mitchell, 2009; Korycinska & Eyre, 2009; EPPO, 2014; CABI/EPPO, 2012 |
| Eukaryota | Metazoa | Arthropoda | Daphnia lumholtzi | Absent, invalid record | | | ISSG, 2008 |
| Eukaryota | Metazoa | Arthropoda | Dendroctonus micans (great spruce bark beetle) | Restricted distribution | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Diabrotica virgifera virgifera (western corn rootworm) | Present, few occurrences | Introduced | Yes | Kiss et al., 2005b; IPPC, 2013; CABI/EPPO, 2012; IPPC, 2014; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Dialeurodes citri (citrus whitefly) | Absent, intercepted only | | | Bowman & Bartlett, 1978 |
| Eukaryota | Metazoa | Arthropoda | Diaspidiotus perniciosus (San José scale) | Absent, intercepted only | | | Kosztarab & Kozár, 1988; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Dikerogammarus villosus (killer shrimp) | Present, few occurrences | Introduced | | BBC, 2010; BBC, 2011a; BBC, 2011b |
| Eukaryota | Metazoa | Arthropoda | Diprion similis (white pine sawfly) | Restricted distribution | Native | | Crooke, 1957; Bevan, 1987; Benson, 1951; Liston, 1995 |
| Eukaryota | Metazoa | Arthropoda | Diuraphis noxia (Russian wheat aphid) | Absent, invalid record | | | EPPO, 2010; EPPO, 2014; Anon., 1963 |
| Eukaryota | Metazoa | Arthropoda | Dreyfusia nordmannianae (silver fir adelges) | Present | Introduced | | Carter & Barson, 1973 |
| Eukaryota | Metazoa | Arthropoda | Drosophila suzukii (spotted wing drosophila) | Present, few occurrences | Introduced | | IPPC, 2012; EPPO, 2013b; EPPO, 2014; CABI/EPPO, 2012 |
| Eukaryota | Metazoa | Arthropoda | Dryocosmus kuriphilus (Oriental chestnut gall wasp) | Present, few occurrences | | | EPPO, 2014; IPPC, 2015; Malumphy, 2015; CABI/EPPO, 2015 |
| Eukaryota | Metazoa | Arthropoda | Duponchelia fovealis (Southern European marshland pyralid) | Present | Introduced | | Clark, 2000; Bradley, 2000; CABI/EPPO, 2008 |
| Eukaryota | Metazoa | Arthropoda | Elatobium abietinum (green spruce aphid) | Widespread | Introduced | | Heie, 1992; Carter & Halldórsson, 1998 |
| Eukaryota | Metazoa | Arthropoda | Ephestia kuehniella (Mediterranean flour moth) | Present | | | Small, 2007 |
| Eukaryota | Metazoa | Arthropoda | Epichoristodes acerbella (South African carnation tortrix) | Absent, intercepted only | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Epiphyas postvittana (light brown apple moth) | Restricted distribution | Introduced | Yes | Carter, 1984; UK CAB International, 1992; Aldford, 1984; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Epitrix tuberis (tuber flea beetle) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Eriocheir sinensis (Chinese mitten crab) | Present | Introduced | Yes | Herborg & et al. , 2002; Gollasch , 1997; Zhao & et al. , 1998; Clark & et al, 1998; NHM, 2004; ISSG, 2004 |
| Eukaryota | Metazoa | Arthropoda | Eriosoma lanigerum (woolly aphid) | Widespread | | | CIE, 1975 |
| Eukaryota | Metazoa | Arthropoda | Eulachnus rileyi (pine needle aphid) | Present | | | NHM, 1919 |
| Eukaryota | Metazoa | Arthropoda | Forficula auricularia (European earwig) | Widespread | Native | | NBN Gateway, 2015 |
| Eukaryota | Metazoa | Arthropoda | Frankliniella occidentalis (western flower thrips) | Widespread | Introduced | Yes | Kirk & Terry, 2003; CABI/EPPO, 1999; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Gilpinia hercyniae (spruce sawfly) | Restricted distribution | Introduced | Yes | Billany & Brown, 1977; Billany, 1978; Bevan, 1987; Benson, 1933; Benson, 1951; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Grapholita molesta (Oriental fruit moth) | Absent, intercepted only | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Gynaikothrips ficorum (Cuban laurel thrips) | Present | | | Jacot-Guillarmod & Brothers, 1986 |
| Eukaryota | Metazoa | Arthropoda | Gypsonoma aceriana (poplar twig borer) | Present | Native | | Razowski, 1996; Anon, 2001 |
| Eukaryota | Metazoa | Arthropoda | Harmonia axyridis (harlequin ladybird) | Localised | Introduced | Yes | Brown et al., 2008a; CABI/EPPO, 2007; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Helicoverpa armigera (cotton bollworm) | Eradicated | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Helicoverpa zea (American cotton bollworm) | Absent, intercepted only | | | Seymour &, 1978 |
| Eukaryota | Metazoa | Arthropoda | Heliothrips haemorrhoidalis (black tea thrips) | Present | | | Mound et al., 1976; CIE, 1961 |
| Eukaryota | Metazoa | Arthropoda | Hemiberlesia lataniae (latania scale) | Introduced, not established | | | NHM, undated glasshouse specimen |
| Eukaryota | Metazoa | Arthropoda | Hemiberlesia rapax (greedy scale (USA)) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Arthropoda | Hemimysis anomala | Present | Introduced | Yes | Holdich et al., 2005; Stubbington et al., 2008 |
| Eukaryota | Metazoa | Arthropoda | Homarus americanus (American lobster) | Present, few occurrences | Introduced | | Stebbing et al., 2012 |
| Eukaryota | Metazoa | Arthropoda | Hylastes ater (black pine bark beetle) | Present | Native | | Wood & Bright, 1992 |
| Eukaryota | Metazoa | Arthropoda | Hylobius abietis (large pine weevil) | Restricted distribution | | | Heritage et al., 1989; Wilson & Day, 1994; Leather et al., 1995; CABI/EPPO, 2003; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Hylurgops palliatus (lesser spruce shoot beetle) | Present | Native | | Wood & Bright, 1992 |
| Eukaryota | Metazoa | Arthropoda | Hylurgus ligniperda (red-haired pine bark beetle) | Present | Native | | Wood & Bright, 1992; CABI/EPPO, 2010 |
| Eukaryota | Metazoa | Arthropoda | Icerya purchasi (cottony cushion scale) | Present | | | Watson & Malumphy, 2004; Malumphy, 2013 |
| Eukaryota | Metazoa | Arthropoda | Ips cembrae (large larch bark beetle) | Restricted distribution | Native | | EPPO/CABI &, 1997; CABI/EPPO, 2007; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Ips duplicatus (double-spined bark beetle) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Ips typographus (eight-toothed bark beetle) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Lasius neglectus (invasive garden ant) | Present, few occurrences | Introduced | Yes | Fox, 2010; Boase, 2014 |
| Eukaryota | Metazoa | Arthropoda | Leptinotarsa decemlineata (Colorado potato beetle) | Eradicated | | | Seymour et al., 1985; CABI/EPPO, 2003 |
| Eukaryota | Metazoa | Arthropoda | Leucoptera malifoliella (pear leaf blister moth) | Restricted distribution | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Lilioceris lilii (lily leaf beetle) | Restricted distribution | Introduced | Yes | Halstead, 1989; Cox, 2001; CABI/EPPO, 2010 |
| Eukaryota | Metazoa | Arthropoda | Limnoria lignorum (gribble) | Widespread | | Yes | Jones, 1963; Menzies, 1959 |
| Eukaryota | Metazoa | Arthropoda | Limnoria quadripunctata (gribble) | Widespread | Native | | Oevering et al., 2001; Borges et al., 2008 |
| Eukaryota | Metazoa | Arthropoda | Linepithema humile (Argentine ant) | Present | Introduced | Yes | Cornwell, 1978; ISSG, 2011 |
| Eukaryota | Metazoa | Arthropoda | Liriomyza cicerina | Present | | | Martinez, 2007 |
| Eukaryota | Metazoa | Arthropoda | Liriomyza huidobrensis (serpentine leafminer) | Eradicated | | | CABI/EPPO, 2002; IPPC, 2009; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Liriomyza sativae (vegetable leaf miner) | Absent, intercepted only | | | Ledieu & Bartlett, 1983; EPPO, 1984; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Liriomyza trifolii (American serpentine leafminer) | Eradicated | | | CABI/EPPO, 1997; IPPC, 2009; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Lobesia botrana (grape berry moth) | Present, few occurrences | | | EPPO, 2014; CABI/EPPO, 2012 |
| Eukaryota | Metazoa | Arthropoda | Lymantria dispar (gypsy moth) | Present, few occurrences | | | Cannon et al., 2004; EPPO, 2014; Nettleton, 1996 |
| Eukaryota | Metazoa | Arthropoda | Lymantria monacha (nun moth) | Present | | Yes | Carter , 1984; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Macrosiphum euphorbiae (potato aphid) | Present | Introduced | | CIE, 1984 |
| Eukaryota | Metazoa | Arthropoda | Meligethes aeneus (rape beetle) | Widespread | | | Kirk-Spriggs, 1996; Fowler, 1889; CABI/EPPO, 2001 |
| Eukaryota | Metazoa | Arthropoda | Monochamus sutor (small white-marmorated longicorn) | Absent, intercepted only | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Monomorium pharaonis (pharaoh ant) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Arthropoda | Mythimna unipuncta (rice armyworm) | Present, few occurrences | Introduced | | CIE, 1967 |
| Eukaryota | Metazoa | Arthropoda | Mytilicola intestinalis (mussel red worm) | Present | | | Aguirre-Macedo & Kennedy, 1999b; Aguirre-Macedo & Kennedy, 1999a; Baird et al., 1951; Campbell, 1970; Dare, 1982; Davey & Gee, 1976; Hepper, 1956; Lauckner, 1983 |
| Eukaryota | Metazoa | Arthropoda | Myzus cerasi (black cherry aphid) | Present | | | Pennell, 1981 |
| Eukaryota | Metazoa | Arthropoda | Myzus persicae (green peach aphid) | Widespread | | | CIE, 1979 |
| Eukaryota | Metazoa | Arthropoda | Neodiprion sertifer (European pine sawfly) | Restricted distribution | Native | | Crooke, 1957; Britton, 1985; Rivers & Crooke, 1962; Liston, 1995 |
| Eukaryota | Metazoa | Arthropoda | Nesticella mogera (cave-dwelling spider) | Localised | Introduced | | Spinnen Forum, 2015 |
| Eukaryota | Metazoa | Arthropoda | Nezara viridula (green stink bug) | Present | | | Salisbury et al., 2009 |
| Eukaryota | Metazoa | Arthropoda | Nipaecoccus nipae (spiked mealybug) | Present, few occurrences | | | Ben-Dov, 1994; CABI/EPPO, 2005 |
| Eukaryota | Metazoa | Arthropoda | Noctua pronuba (common yellow underwing moth) | Widespread | | | Heath & Emmet, 1979 |
| Eukaryota | Metazoa | Arthropoda | Opogona sacchari (banana moth) | Eradicated | | | Moreton, 1974; Seymour et al., 1985; CABI & EPPO, 1999; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Orconectes virilis (virile crayfish) | Localised | Introduced | Yes | Ahern et al., 2008 |
| Eukaryota | Metazoa | Arthropoda | Orthotomicus erosus (Mediterranean pine beetle) | Present | Introduced | | Wood & Bright, 1992 |
| Eukaryota | Metazoa | Arthropoda | Ostrinia nubilalis (European maize borer) | Restricted distribution | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Otiorhynchus sulcatus (vine weevil) | Widespread | | | Cross et al., 1995; Crook, 1996; Cross & Burgess, 1997; Graham et al., 1996; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Pacifastacus leniusculus (American signal crayfish) | Present | Introduced | | Lewis , 2002 |
| Eukaryota | Metazoa | Arthropoda | Palaemon elegans (rock shrimp) | Present | Native | | d'Udekem d'Acoz, 1999 |
| Eukaryota | Metazoa | Arthropoda | Palaemon macrodactylus (oriental shrimp) | Localised | Introduced | | Ashelby et al., 2004; Worsfold & Ashelby, 2008 |
| Eukaryota | Metazoa | Arthropoda | Paranthrene tabaniformis (poplar clearwing moth) | Widespread | | | South, 1939; Lastuvka & Lastuvka, 1995 |
| Eukaryota | Metazoa | Arthropoda | Paratrechina longicornis (crazy ant) | Present | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Arthropoda | Parthenolecanium persicae (peach scale) | Present | | | Green, 1925b; CIE, 1979; Newstead, 1900 |
| Eukaryota | Metazoa | Arthropoda | Paysandisia archon (South American palm borer) | Eradicated | | | EPPO, 2014; Reid, 2008 |
| Eukaryota | Metazoa | Arthropoda | Pheidole megacephala (big-headed ant) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Arthropoda | Phloeomyzus passerinii (poplar woolly aphid) | Present | Native | | Theobald, 1929 |
| Eukaryota | Metazoa | Arthropoda | Phthorimaea operculella (potato tuber moth) | Absent, reported but not confirmed | | | CABI/EPPO, 2012; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Pieris brassicae (large cabbage white) | Widespread | | | Maitland-Emmet et al., 1989; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Pieris rapae (cabbage white butterfly) | Present | | | CIE, 1952 |
| Eukaryota | Metazoa | Arthropoda | Pineus pini (pine woolly aphid) | Widespread | Native | | Carter, 1971 |
| Eukaryota | Metazoa | Arthropoda | Pissodes castaneus (small banded pine weevil) | Restricted distribution | Native | | Bevan, 1987; CAB European, 1998; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Planococcus citri (citrus mealybug) | Present | | | Malumphy & Badmin, 2012; CABI/EPPO, 1999 |
| Eukaryota | Metazoa | Arthropoda | Plutella xylostella (diamondback moth) | Present | | | CIE, 1967 |
| Eukaryota | Metazoa | Arthropoda | Polyphagotarsonemus latus (broad mite) | Present | | | CIE, 1986 |
| Eukaryota | Metazoa | Arthropoda | Procambarus clarkii (red swamp crayfish) | Present | Introduced | Yes | Holdich & et al. , 1999 |
| Eukaryota | Metazoa | Arthropoda | Procambarus fallax f. virginalis (Marmorkrebs) | Absent, intercepted only | Introduced | | Peay et al., 2010 |
| Eukaryota | Metazoa | Arthropoda | Pseudaulacaspis pentagona (mulberry scale) | Absent, formerly present | | | Seymour, 1989; Danzig, 1993; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Pseudococcus viburni (osbcure mealybug) | Present | Introduced | | Gimpel & Miller, 1996; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Pyrrhalta luteola (elm leaf beetle) | Present | Introduced | | Howard, 1899 |
| Eukaryota | Metazoa | Arthropoda | Rhagoletis cingulata (cherry fruit fly) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Rhagoletis completa (walnut husk fly) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Rhinocyllus conicus (thistle-head weevil) | Present | | | Denton, 2011; Alonso-Zarazaga & Talamelli, 2011 |
| Eukaryota | Metazoa | Arthropoda | Rhithropanopeus harrisii | Localised | Introduced | | Eno et al., 1997 |
| Eukaryota | Metazoa | Arthropoda | Rhyacionia buoliana (European pine shoot moth) | Restricted distribution | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Rhynchophorus ferrugineus (red palm weevil) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Rhyzopertha dominica (lesser grain borer) | Present | | | Dyte et al., 1975; Jacobson & Thomas, 1981 |
| Eukaryota | Metazoa | Arthropoda | Saissetia oleae (olive scale) | Present | | | Ben-Dov, 1993; CIE, 1973 |
| Eukaryota | Metazoa | Arthropoda | Saperda carcharias (large poplar borer) | Present | | | Ritchie, 1920 |
| Eukaryota | Metazoa | Arthropoda | Saperda populnea (small poplar borer) | Present | Native | | Allen, 1979; Chandler, 1989 |
| Eukaryota | Metazoa | Arthropoda | Scirtothrips dorsalis (chilli thrips) | Present, few occurrences | | | EPPO, 2014; IPPC, 2009 |
| Eukaryota | Metazoa | Arthropoda | Scolytus intricatus (European oak bark beetle) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Arthropoda | Scyphophorus acupunctatus (agave weevil) | Present | | | CABI/EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Siphoninus phillyreae (ash whitefly) | Restricted distribution | | | CABI/EPPO, 2013; Mound & Halsey, 1978; Malumphy, 2010; Springate & Arnold, 2012 |
| Eukaryota | Metazoa | Arthropoda | Sirex noctilio (woodwasp) | Widespread | | | EPPO, 2014; Smith, 1978 |
| Eukaryota | Metazoa | Arthropoda | Sitophilus granarius (grain weevil) | Present | | | Champ & Dyte, 1976 |
| Eukaryota | Metazoa | Arthropoda | Sitophilus oryzae (lesser grain weevil) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Arthropoda | Sitophilus zeamais (greater grain weevil) | Present | | | Champ & Dyte, 1976 |
| Eukaryota | Metazoa | Arthropoda | Spodoptera littoralis (cotton leafworm) | Eradicated | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Spodoptera litura (taro caterpillar) | Transient: actionable, under eradication | | | IPPC, 2010; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Tapinoma melanocephalum (ghost ant) | Present | Introduced | | Vipin Shah et al., 1999 |
| Eukaryota | Metazoa | Arthropoda | Tetranychus urticae (two-spotted spider mite) | Present | | | IIE, 1996 |
| Eukaryota | Metazoa | Arthropoda | Tetropium castaneum (black spruce beetle) | Widespread | Introduced | | Danilevsky, 2003; Bílý & Mehl, 1989 |
| Eukaryota | Metazoa | Arthropoda | Tetropium fuscum (brown spruce longhorn beetle) | Present, few occurrences | Introduced | | Bílý & Mehl, 1989 |
| Eukaryota | Metazoa | Arthropoda | Thaumatotibia leucotreta (false codling moth) | Absent, intercepted only | | | EPPO, 2014; CABI/EPPO, 2002 |
| Eukaryota | Metazoa | Arthropoda | Thaumetopoea pityocampa (pine processionary) | Absent, formerly present | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Thaumetopoea processionea (oak processionary moth) | Present | Introduced | | Williams et al., 2013; Townsend, 2007; IPPC, 2007; Townsend, 2009 |
| Eukaryota | Metazoa | Arthropoda | Thrips palmi (melon thrips) | Eradicated | | | CABI/EPPO, 1998; IPPC, 2008; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Tipula paludosa (European crane fly) | Widespread | | | Rennie, 1916; Oosterbroek & Theowald, 1992; CIE, 1977 |
| Eukaryota | Metazoa | Arthropoda | Tomicus piniperda (common pine shoot beetle) | Widespread | | | Hanson, 1937 |
| Eukaryota | Metazoa | Arthropoda | Trialeurodes ricini (castor bean whitefly) | Absent, intercepted only | Introduced | Yes | EPPO, 2000 |
| Eukaryota | Metazoa | Arthropoda | Trialeurodes vaporariorum (whitefly, greenhouse) | Present | | | Gorman et al., 1998; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Trogoderma granarium (khapra beetle) | Absent, formerly present | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Tuta absoluta (tomato leafminer) | Eradicated | | | EPPO, 2014; CABI/EPPO, 2013; IPPC, 2015 |
| Eukaryota | Metazoa | Arthropoda | Varroa destructor (Varroa mite) | Present | | | OIE, 2009; Fera, 2010 |
| Eukaryota | Metazoa | Arthropoda | Vespula germanica (German wasp) | Widespread | Native | | Edwards, 1984 |
| Eukaryota | Metazoa | Arthropoda | Vespula vulgaris (wasp, common) | Present | | | CAB Abstracts |
| Eukaryota | Metazoa | Arthropoda | Viteus vitifoliae (grapevine phylloxera) | Present, few occurrences | | | EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Wasmannia auropunctata (little fire ant) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Arthropoda | Xyleborinus saxesenii (fruit-tree pinhole borer) | Present | Native | | Wood & Bright, 1992 |
| Eukaryota | Metazoa | Arthropoda | Xyleborus dispar (pear blight beetle) | Widespread | Native | | Alford, 1984; Duffy, 1953 |
| Eukaryota | Metazoa | Arthropoda | Xylosandrus morigerus (brown twig beetle) | Present, few occurrences | Introduced | | Wood & Bright, 1992; EPPO, 2014 |
| Eukaryota | Metazoa | Arthropoda | Zeuzera pyrina (moth, wood leopard) | Restricted distribution | | | CIE, 1973; Gatwick, 1992 |
| Eukaryota | Metazoa | Brachiopoda | Bythotrephes longimanus (spiny waterflea) | Widespread | Native | | Ketelaars & Gille, 1994 |
| Eukaryota | Metazoa | Bryozoa | Bugula neritina (brown bryozoan) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Bryozoa | Schizoporella errata (branching bryozoan) | Present | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Bryozoa | Tricellaria inopinata | Widespread | Introduced | Yes | Arenas et al., 2006 |
| Eukaryota | Metazoa | Chordata | Alburnus alburnus (bleak) | Present | Native | | Maitland & Campbell, 1992; Froese Pauly, 2004 |
| Eukaryota | Metazoa | Chordata | Alopochen aegyptiaca (Egyptian goose) | Localised | Introduced | | Banks et al., 2008 |
| Eukaryota | Metazoa | Chordata | Ambloplites rupestris (rock bass) | Localised | Introduced | | Welcomme, 1988 |
| Eukaryota | Metazoa | Chordata | Ameiurus melas (black bullhead) | Present | Introduced | | Wheeler , 1992; Froese Pauly, 2004 |
| Eukaryota | Metazoa | Chordata | Ameiurus nebulosus (brown bullhead) | Present | Introduced | | Bartley, 2006 |
| Eukaryota | Metazoa | Chordata | Anser indicus (bar-headed goose) | Localised | Introduced | | Banks et al., 2008 |
| Eukaryota | Metazoa | Chordata | Aristichthys nobilis (bighead carp) | See datasheet for status | | | |
| Eukaryota | Metazoa | Chordata | Ascidiella aspersa (European sea squirt) | Present | Native | | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Bos taurus (cattle) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Chordata | Branta canadensis (Canada goose) | Widespread | Introduced | Yes | Blair et al., 2000 |
| Eukaryota | Metazoa | Chordata | Branta hutchinsii | Present, few occurrences | Introduced | | Banks et al., 2008 |
| Eukaryota | Metazoa | Chordata | Bubulcus ibis (cattle egret) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Chordata | Capra hircus (goats) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Chordata | Carassius auratus auratus (goldfish) | Present | Introduced | | Froese & Pauly, 2009 |
| Eukaryota | Metazoa | Chordata | Cervus elaphus (red deer) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Chordata | Cervus nippon (sika) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Chordata | Chrysemys picta (painted turtle) | Absent, formerly present | Introduced | | Kraus, 2009; Arnold & Ovenden, 2002; Beebee & Griffiths, 2000; Fitter, 1959; Frazer, 1964; Swanton, 1928; Taylor, 1948; Taylor, 1963 |
| Eukaryota | Metazoa | Chordata | Clarias batrachus (walking catfish) | Present | Introduced | | Welcomme, 1988 |
| Eukaryota | Metazoa | Chordata | Columba livia (pigeons) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Chordata | Coregonus albula (vendace) | Present | Native | | Froese Pauly, 2004; Etheridge et al., 2012 |
| Eukaryota | Metazoa | Chordata | Corvus splendens (house crow) | Absent, unreliable record | Introduced | | Ryall, 2002 |
| Eukaryota | Metazoa | Chordata | Ctenopharyngodon idella (grass carp) | Present | Introduced | | Welcomme, 1988; FishBase, 2004; Froese Pauly, 2004 |
| Eukaryota | Metazoa | Chordata | Cygnus olor (mute swan) | Present | Native | | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Cyprinus carpio (common carp) | Widespread | Introduced | | Welcomme, 1988 |
| Eukaryota | Metazoa | Chordata | Erinaceus europaeus (European hedgehog) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Chordata | Esox lucius (pike) | Present | Native | | Froese Pauly, 2004; Maitland & Lyle, 1996 |
| Eukaryota | Metazoa | Chordata | Felis catus (cat) | Present | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Gymnocephalus cernuus (ruffe) | Present | | | Wheeler, 1992; Winfield et al., 1998 |
| Eukaryota | Metazoa | Chordata | Hypophthalmichthys molitrix (silver carp) | Present | Introduced | | FishBase, 2005 |
| Eukaryota | Metazoa | Chordata | Hypostomus plecostomus (suckermouth catfish) | Present | Introduced | | Bartley, 2006 |
| Eukaryota | Metazoa | Chordata | Ictalurus punctatus (channel catfish) | Present | Introduced | | Welcomme, 1988; Maitland, 2004; Froese Pauly, 2004; DAISIE, 2013 |
| Eukaryota | Metazoa | Chordata | Lepomis gibbosus (pumpkinseed) | Widespread | Introduced | Yes | Cucherousset et al., 2009 |
| Eukaryota | Metazoa | Chordata | Lepus europaeus (European hare) | Widespread | Introduced | Yes | Yalden, 1999 |
| Eukaryota | Metazoa | Chordata | Leucaspius delineatus (sunbleak) | Present, few occurrences | Introduced | | Pinder & Gozlan, 2003 |
| Eukaryota | Metazoa | Chordata | Leuciscus leuciscus (common dace) | Widespread | Native | | Wheeler, 1992 |
| Eukaryota | Metazoa | Chordata | Micropterus dolomieu (smallmouth bass) | Present | Introduced | | Welcomme, 1988 |
| Eukaryota | Metazoa | Chordata | Micropterus salmoides (largemouth bass) | Eradicated | Introduced | | Welcomme, 1988; Froese Pauly, 2004 |
| Eukaryota | Metazoa | Chordata | Muntiacus reevesi (Reeves' muntjac) | Widespread | Introduced | | Chapman, 2008 |
| Eukaryota | Metazoa | Chordata | Mus musculus (house mouse) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Chordata | Mus musculus (house mouse) | Present | | | Searle & Jones, 2002 |
| Eukaryota | Metazoa | Chordata | Mustela erminea (ermine) | Present | Native | | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Mustela putorius furo (ferret) | Present | Introduced | Yes | Long, 2003 |
| Eukaryota | Metazoa | Chordata | Myiopsitta monachus (monk parakeet) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Chordata | Myocastor coypus (coypu) | Eradicated | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Neovison vison (American mink) | Present | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Odocoileus hemionus (black-tailed deer) | Absent, formerly present | Introduced | | Long, 2003 |
| Eukaryota | Metazoa | Chordata | Oncorhynchus mykiss (rainbow trout) | Present | Introduced | | Welcomme, 1988; Froese Pauly, 2004; DAISIE, 2011 |
| Eukaryota | Metazoa | Chordata | Oncorhynchus tshawytscha (chinook salmon) | Present | Introduced | | Welcomme, 1988; Froese Pauly, 2004 |
| Eukaryota | Metazoa | Chordata | Ondatra zibethicus (muskrat) | Eradicated | Introduced | | Danell, 1996 |
| Eukaryota | Metazoa | Chordata | Oreochromis mossambicus (Mozambique tilapia) | Present | Introduced | | Pullin et al., 1997 |
| Eukaryota | Metazoa | Chordata | Oreochromis niloticus (Nile tilapia) | Present | Introduced | | Pullin et al., 1997; Froese Pauly, 2004; Romana, 1988 |
| Eukaryota | Metazoa | Chordata | Oryctolagus cuniculus (rabbits) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Chordata | Osmerus eperlanus | Localised | Native | | Maitland, 2003 |
| Eukaryota | Metazoa | Chordata | Ovis aries (sheep) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Chordata | Oxyura jamaicensis (ruddy duck) | Present | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Passer domesticus (house sparrow) | Present | Native | | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Perca fluviatilis (perch) | Present | Native | | Fishbase, 2004 |
| Eukaryota | Metazoa | Chordata | Petromyzon marinus (sea lamprey) | Present | Native | | Muus & Dahlström, 1978 |
| Eukaryota | Metazoa | Chordata | Phasianus colchicus (common pheasant) | Widespread | Introduced | | Stoate, 2002; BirdLife International, 2015a; eBird, 2015 |
| Eukaryota | Metazoa | Chordata | Phoxinus phoxinus (European minnow) | Present | | | Maitland, 2004; Froese & Pauly, 2008; CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Chordata | Pimephales promelas (fathead minnow) | Present, few occurrences | Introduced | | Godard et al., 2010 |
| Eukaryota | Metazoa | Chordata | Podarcis sicula (Italian wall lizard) | Eradicated | Introduced | | Hodgkins et al., 2012 |
| Eukaryota | Metazoa | Chordata | Poecilia reticulata (guppy) | Present | Introduced | | Welcomme, 1988 |
| Eukaryota | Metazoa | Chordata | Pseudorasbora parva (topmouth gudgeon) | Present | Introduced | Yes | FAO, 1997; Pinder et al., 2005 |
| Eukaryota | Metazoa | Chordata | Psittacula krameri (rose-ringed parakeet) | Widespread | Introduced | Yes | Strubbe & Matthysen, 2009a |
| Eukaryota | Metazoa | Chordata | Rana catesbeiana (American bullfrog) | Localised | Introduced | | Zavod Symbiosis, 2005; Banks et al., 2000; CABI Bioscience et al., 2005; Kraus, 2009; Marland, 2003 |
| Eukaryota | Metazoa | Chordata | Rattus norvegicus (brown rat) | Restricted distribution | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Rattus rattus (black rat) | Restricted distribution | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Rutilus rutilus (roach) | Present | Native | | Kottelat & Freyhof, 2007; Wheeler, 1992; Maitland & Campbell, 1992; Froese Pauly, 2004; Treasurer, 1990 |
| Eukaryota | Metazoa | Chordata | Salmo salar (Atlantic salmon) | Present | Native | | Muus & Dahlström, 1974; Froese Pauly, 2004 |
| Eukaryota | Metazoa | Chordata | Salmo trutta (sea trout) | Present | Native | | Muus & Dahlström, 1974; Froese Pauly, 2004 |
| Eukaryota | Metazoa | Chordata | Salvelinus fontinalis (brook trout) | Present | Introduced | | Froese Pauly, 2004; Elvira, 2001 |
| Eukaryota | Metazoa | Chordata | Sander lucioperca (pike-perch) | Present | Introduced | | Froese Pauly, 2004; Smith et al., 1998 |
| Eukaryota | Metazoa | Chordata | Scardinius erythrophthalmus (rudd) | Present | Native | | Froese Pauly, 2004; Maitland & Campbell, 1992 |
| Eukaryota | Metazoa | Chordata | Sciurus carolinensis (grey squirrel) | Present | Introduced | Yes | ISSG, 2011 |
| Eukaryota | Metazoa | Chordata | Silurus glanis (wels catfish) | Present | Introduced | | Froese & Pauly, 2012 |
| Eukaryota | Metazoa | Chordata | Squalius cephalus (European chub) | Present | Native | | Maitland & Campbell, 1992 |
| Eukaryota | Metazoa | Chordata | Streptopelia decaocto (Eurasian collared-dove) | Present | Introduced | | Hengeveld, 1988; Coombs et al., 1981 |
| Eukaryota | Metazoa | Chordata | Sturnus vulgaris (common starling) | Present | | | |
| Eukaryota | Metazoa | Chordata | Styela clava (Asian tunicate) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Chordata | Styela plicata (pleated sea squirt) | Present | | | World Register of Marine Species (WoRMS), 2012 |
| Eukaryota | Metazoa | Chordata | Sus scrofa [ISC] (feral pig) | Localised | | | Goulding, 2012; Wilson, 2005; Frantz et al., 2012 |
| Eukaryota | Metazoa | Chordata | Threskiornis aethiopicus (sacred ibis) | Present, few occurrences | Introduced | | J. Marchant, British Trust for Ornithology, Thetford, UK, personal comunication, 2011 |
| Eukaryota | Metazoa | Chordata | Tilapia zillii (redbelly tilapia) | Present | Introduced | | Welcomme, 1988; Froese Pauly, 2004 |
| Eukaryota | Metazoa | Chordata | Tinca tinca (tench) | Present | Native | | FishBase, 2004 |
| Eukaryota | Metazoa | Chordata | Trachemys scripta elegans (red-eared slider) | Present, see datasheet for details | | | |
| Eukaryota | Metazoa | Chordata | Tyto alba (Barn owl) | Widespread | Native | | Parkin & Knox, 2009 |
| Eukaryota | Metazoa | Chordata | Vulpes vulpes (red fox) | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Metazoa | Chordata | Xenopus laevis (African clawed frog) | Present | Introduced | | ISSG, 2011 |
| Eukaryota | Metazoa | Cnidaria | Cordylophora (euryhaline hydroid) | Present | Introduced | Yes | Roch, 1924; Barnes, 1987; Chain, 1980; Moore, 1952 |
| Eukaryota | Metazoa | Cnidaria | Gonionemus vertens | Widespread | Introduced | | Eno et al., 1997 |
| Eukaryota | Metazoa | Cnidaria | Myxobolus cerebralis (whirling disease agent) | Present | | | Elson, 1969; Hoffman, 1990 |
| Eukaryota | Metazoa | Cnidaria | Pelagia noctiluca (mauve stinger) | Present | Native | Yes | Hunt, 1952; Russell, 1938; Russell, 1967 |
| Eukaryota | Metazoa | Mollusca | Arion vulgaris (Spanish slug) | Widespread | Introduced | Yes | Davies, 1987; Kerney, 1999 |
| Eukaryota | Metazoa | Mollusca | Candidula intersecta (wrinkled dune snail) | Widespread | Introduced | | Anderson, 2005 |
| Eukaryota | Metazoa | Mollusca | Corbicula fluminea (Asian clam) | Present | Introduced | Yes | Aldridge & Muller, 2001 |
| Eukaryota | Metazoa | Mollusca | Cornu aspersum (common garden snail) | Widespread | Introduced | | Mulvey et al., 1996; Taylor, 1914; Godan, 1983; Kerney, 1999; Kerney & Cameron, 1979; Reichling, 1950 |
| Eukaryota | Metazoa | Mollusca | Crassostrea gigas (Pacific oyster) | Present | Introduced | Yes | Utting & Spencer, 1992 |
| Eukaryota | Metazoa | Mollusca | Crassostrea virginica (eastern oyster) | Present | Introduced | | FIGIS, 2005; FAO, 2007; FAO, 2007; FAO, 2005 |
| Eukaryota | Metazoa | Mollusca | Crepidula fornicata (American slipper limpet) | Widespread | Introduced | Yes | Spencer, 1974; Utting & Spencer, 1992 |
| Eukaryota | Metazoa | Mollusca | Deroceras invadens (tramp slug) | Present | Introduced | Yes | Fauna Europea, 2015 |
| Eukaryota | Metazoa | Mollusca | Deroceras laeve (meadow slug) | Widespread | Native | | Fauna Europea, 2015 |
| Eukaryota | Metazoa | Mollusca | Deroceras reticulatum (grey field slug) | Widespread | | | Glen et al., 1991; Kerney et al., 1979 |
| Eukaryota | Metazoa | Mollusca | Dreissena polymorpha (zebra mussel) | Present | Introduced | Yes | ISSG, 2008 |
| Eukaryota | Metazoa | Mollusca | Dreissena rostriformis bugensis (quagga mussel) | Present | Introduced | Yes | NNSS, 2014 |
| Eukaryota | Metazoa | Mollusca | Ensis directus | Widespread | Introduced | Yes | Severijns, 2002 |
| Eukaryota | Metazoa | Mollusca | Limax maximus (leopard slug) | Widespread | Native | | Anderson, 2005; Meiklejohn, 1973; Taylor 1902-1907 |
| Eukaryota | Metazoa | Mollusca | Littorina littorea (common periwinkle) | Widespread | Native | | Brawley et al., 2009 |
| Eukaryota | Metazoa | Mollusca | Mytilus galloprovincialis (Mediterranean mussel) | Present | | | Gosling, 1992 |
| Eukaryota | Metazoa | Mollusca | Oxychilus alliarius (garlic snail) | Present | Native | | GBIF, 2016; Kerney et al., 1983 |
| Eukaryota | Metazoa | Mollusca | Petricolaria pholadiformis (false angel wing) | Present | Introduced | | Naylor, 1957 |
| Eukaryota | Metazoa | Mollusca | Pinctada imbricata radiata (rayed pearl oyster) | Present | Introduced | | Holmes et al., 2015; Turk, 1988 |
| Eukaryota | Metazoa | Mollusca | Potamopyrgus antipodarum (New Zealand mudsnail) | Present | Introduced | | Grant & Briggs, 1998; EPPO, 2014; Boycott, 1936; Heywood & Edwards, 1962 |
| Eukaryota | Metazoa | Mollusca | Rapana venosa (veined rapana whelk) | Present | Introduced | | Kerckhof et al., 2006 |
| Eukaryota | Metazoa | Mollusca | Ruditapes philippinarum (Japanese carpet shell) | Present | Introduced | Yes | Utting et al., 1996; Burton et al., 2001; Morgan, 2002; Qi ZhongYan, 1998; Jensen et al., 2004 |
| Eukaryota | Metazoa | Mollusca | Theba pisana (white garden snail) | Restricted distribution | | | EPPO, 2014; Cowie, 1990; Cowie, 1982; Cowie, 1983; Cowie, 1984b; Cowie, 1986; Cowie, 1987; Deblock, 1962; Fowles & Cowie, 1989; Humphreys et al., 1982; Pennant, 1777; Taylor 1906-1914 |
| Eukaryota | Metazoa | Nematoda | Anguillicoloides crassus | Widespread | Introduced | Yes | Lyndon & Pieters, 2005; Kennedy & Fitch, 1990 |
| Eukaryota | Metazoa | Nematoda | Aphelenchoides besseyi (rice leaf nematode) | Absent, intercepted only | | | CABI/EPPO, 2000; EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Aphelenchoides fragariae (strawberry crimp nematode) | Restricted distribution | | | Goodey, 1933; Franklin, 1950; Anon, 1973; Duggan, 1969; Roberts, 1981; CABI/EPPO, 2002; EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Aphelenchoides ritzemabosi (Chrysanthemum foliar eelworm) | Present | | | Roberts, 1981; MAFF, 1970; CABI/EPPO, 2000; EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Bursaphelenchus xylophilus (pine wilt nematode) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Ditylenchus destructor (potato tuber nematode) | Present, few occurrences | | | EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Ditylenchus dipsaci (stem and bulb nematode) | Widespread | | | CABI/EPPO, 2009; EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Globodera pallida (white potato cyst nematode) | Restricted distribution | Introduced | | Minnis et al., 2002; CABI/EPPO, 2011; EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Globodera rostochiensis (yellow potato cyst nematode) | Restricted distribution | Introduced | Yes | Minnis et al., 2002; CABI/EPPO, 2011; EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Helicotylenchus multicinctus (banana spiral nematode) | Present | | | Siddiqi, 1973; CABI/EPPO, 2003 |
| Eukaryota | Metazoa | Nematoda | Heterodera glycines (soybean cyst nematode) | Absent, unreliable record | | | CABI/EPPO, 2011 |
| Eukaryota | Metazoa | Nematoda | Heterodera glycines (soybean cyst nematode) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Heterodera goettingiana (pea cyst eelworm) | Present | | | Brown, 1958; Jones, 1965; CABI/EPPO, 2003; EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Meloidogyne arenaria (peanut root-knot nematode) | Present | | | CABI/EPPO, 2003 |
| Eukaryota | Metazoa | Nematoda | Meloidogyne chitwoodi (columbia root-knot nematode) | Absent, confirmed by survey | | | EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Meloidogyne fallax (false Columbia root-knot nematode) | Restricted distribution | | | EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Meloidogyne hapla (root knot nematode) | Present | | | Southey, 1974; CABI/EPPO, 2002 |
| Eukaryota | Metazoa | Nematoda | Meloidogyne incognita (root-knot nematode) | Present | | | CABI/EPPO, 2002 |
| Eukaryota | Metazoa | Nematoda | Radopholus similis (burrowing nematode) | Absent, intercepted only | | | CABI/EPPO, 1999; EPPO, 2014 |
| Eukaryota | Metazoa | Nematoda | Trichinella | Last reported 1977 | | | OIE Handistatus, 2005 |
| Eukaryota | Metazoa | Nematoda | Xiphinema diversicaudatum (dagger nematode) | Widespread | | | Brown & Taylor, 1987; CABI/EPPO, 2001; EPPO, 2014 |
| Eukaryota | Metazoa | Platyhelminthes | Arthurdendyus triangulatus (New Zealand flatworm) | Widespread | Introduced | Yes | Boag et al., 1994b; Jones & Boag, 1996; Moore et al., 1998; Murchie et al., 2003; Willis & Edwards, 1977 |
| Eukaryota | Metazoa | Platyhelminthes | Bothriocephalus acheilognathi | Present | Introduced | | Andrews et al., 1981 |
| Eukaryota | Metazoa | Platyhelminthes | Taenia solium | Disease not reported | | | OIE, 2009 |
| Eukaryota | Planctomycetes [kingdom] | | Chlamydophila abortus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Eukaryota | Planctomycetes [kingdom] | | Chlamydophila psittaci | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Plantae | Chlorophyta | Codium fragile subsp. tomentosoides | Widespread | Introduced | Yes | Provan et al., 2005; Guiry & Guiry, 2007; Trowbridge, 1999 |
| Eukaryota | Plantae | Haptophyta | Prymnesium parvum (golden algae) | Present | Introduced | Yes | Watson, 2001; Holdway et al., 1978 |
| Eukaryota | Plantae | Phaeophyta | Sargassum muticum (wire weed) | Widespread | Introduced | Yes | Farnham et al., 1973; Harries et al., 2007 |
| Eukaryota | Plantae | Phaeophyta | Undaria pinnatifida (Asian kelp) | Present | Introduced | | Fletcher & Manfredi, 1995 |
| Eukaryota | Plantae | Pteridophyta | Azolla filiculoides (water fern) | Present | Introduced | Yes | Royal Botanic Garden Edinburgh, 2003; EPPO, 2014 |
| Eukaryota | Plantae | Pteridophyta | Cyrtomium falcatum (Japanese holly fern) | Present | Introduced | | Bonafede et al., 1993; Corkhill, 1977; Hibernicarum, 2008; Hutchinson & Thomas, 1992; Jermy & British, 1978 |
| Eukaryota | Plantae | Pteridophyta | Equisetum arvense (field horsetail) | Present | | | Holm et al., 1991 |
| Eukaryota | Plantae | Pteridophyta | Pteridium aquilinum (bracken) | Widespread | Native | | Tutin & et al, 1964 |
| Eukaryota | Plantae | Rhodophyta | Grateloupia turuturu | Localised | Introduced | Yes | Farnham, 1997; Farnham & Irvine, 1973; Gavio & Fredericq, 2002; Maggs & Stegenga, 1999; Marston & Villalard-Bohnsack, 2002 |
| Eukaryota | Plantae | Rhodophyta | Polysiphonia brodiei | Widespread | Native | | Hardy & Guiry, 2003; Maggs & Hommersand, 1993 |
| Eukaryota | Plantae | Spermatophyta | Abutilon theophrasti (velvet leaf) | Present | Introduced | | USDA-ARS, 2003 |
| Eukaryota | Plantae | Spermatophyta | Acacia longifolia (golden wattle) | Present, few occurrences | Introduced | | PROTA, 2015 |
| Eukaryota | Plantae | Spermatophyta | Acacia melanoxylon (Australian blackwood) | Present | Introduced | | Weber , 2003 |
| Eukaryota | Plantae | Spermatophyta | Acer negundo (box elder) | Restricted distribution | Introduced | | Clement & Foster, 1994 |
| Eukaryota | Plantae | Spermatophyta | Acer platanoides (Norway maple) | Present | Introduced | Yes | Weber , 2003 |
| Eukaryota | Plantae | Spermatophyta | Acer pseudoplatanus (sycamore) | Widespread | Introduced | | Mitchell, 1974; Cronk & Fuller , 1995 |
| Eukaryota | Plantae | Spermatophyta | Acer rufinerve (grey snake-bark maple) | Present, few occurrences | Introduced | | GBIF, 2015 |
| Eukaryota | Plantae | Spermatophyta | Achillea millefolium (yarrow) | Present | Native | | Missouri Botanical Garden, 2015 |
| Eukaryota | Plantae | Spermatophyta | Aegilops cylindrica | Localised | Introduced | | Slageren MWvan, 1994 |
| Eukaryota | Plantae | Spermatophyta | Ageratum conyzoides (billy goat weed) | Present only in captivity/cultivation | Introduced | | PROTA, 2016 |
| Eukaryota | Plantae | Spermatophyta | Ageratum houstonianum (blue billygoat weed) | Present, few occurrences | Introduced | | PFAF, 2016; Miller, 1768 |
| Eukaryota | Plantae | Spermatophyta | Agrostis avenacea (Pacific bent grass) | Localised | Introduced | | GBIF, 2015 |
| Eukaryota | Plantae | Spermatophyta | Agrostis capillaris (common bent) | Present | Native | | Tutin et al., 1980 |
| Eukaryota | Plantae | Spermatophyta | Ailanthus altissima (tree-of-heaven) | Present | Introduced | | Weber , 2003; Hu, 1979; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Aira caryophyllea (silver hairgrass) | Present | Native | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Akebia quinata (five-leaf akebia) | Present | Introduced | Yes | ISSG, 2012; EPPO, 2014; EPPO, 2012 |
| Eukaryota | Plantae | Spermatophyta | Albizia julibrissin (silk tree) | Present | Introduced | | |
| Eukaryota | Plantae | Spermatophyta | Alliaria petiolata (garlic mustard) | Present | Native | | Royal Botanic Garden Edinburgh, 2003 |
| Eukaryota | Plantae | Spermatophyta | Alnus glutinosa (European alder) | Present | Native | | McVean, 1953; Savill, 1991; Duke, 1983 |
| Eukaryota | Plantae | Spermatophyta | Alopecurus myosuroides (black-grass) | Present | | | Naylor, 1972; Flora Europaea, 2008; Elliot et al., 1979; Foster et al., 1993 |
| Eukaryota | Plantae | Spermatophyta | Alopecurus pratensis (meadow foxtail) | Present | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Amaranthus hybridus (smooth pigweed) | Present | | | Aellen & Akeroyd, 1993 |
| Eukaryota | Plantae | Spermatophyta | Amaranthus retroflexus (redroot pigweed) | Present | | | Brenan, 1961 |
| Eukaryota | Plantae | Spermatophyta | Amaranthus tuberculatus (rough-fruited water-hemp) | Present | Introduced | | Iamonico, 2015 |
| Eukaryota | Plantae | Spermatophyta | Ambrosia artemisiifolia (common ragweed) | Present | Introduced | | Allard, 1943; Salisbury, 1961; EPPO, 2014; Euro+Med, 2016; Chauvel & Martinez, 2012 |
| Eukaryota | Plantae | Spermatophyta | Ambrosia trifida (giant ragweed) | Present | Introduced | | Allard, 1943; EPPO, 2014; USDA-ARS, 2016; DAISIE, 2016; Euro+Med, 2016 |
| Eukaryota | Plantae | Spermatophyta | Amelanchier lamarckii (snowy mespilus) | Present | Introduced | | Kurtto, 2009; Natural England, 2009; Stace et al., 2009 |
| Eukaryota | Plantae | Spermatophyta | Amelanchier spicata (dwarf serviceberry) | Present | | | RHS, 2009 |
| Eukaryota | Plantae | Spermatophyta | Ammophila arenaria (marram grass) | Present | Native | | USDA-ARS, 2015; Euro+Med PlantBase, 2011 |
| Eukaryota | Plantae | Spermatophyta | Ampelopsis arborea (peppervine) | Present only in captivity/cultivation | Introduced | | Jarvis, 1973 |
| Eukaryota | Plantae | Spermatophyta | Anagallis arvensis (scarlet pimpernel) | Widespread | | | Holm et al., 1991; Stevens et al., 1994 |
| Eukaryota | Plantae | Spermatophyta | Anethum graveolens (dill) | Present | Introduced | | Hand, 2011; DAISIE, 2015 |
| Eukaryota | Plantae | Spermatophyta | Anthemis cotula (dog fennel) | Present | Introduced | | Holm et al., 1979; USDA-ARS, 2003 |
| Eukaryota | Plantae | Spermatophyta | Anthoxanthum odoratum (sweet vernal grass) | Present | Native | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Arctotheca calendula (capeweed) | Transient: actionable, under eradication | | | EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Aronia x prunifolia | Present only in captivity/cultivation | Introduced | | Stace, 1991 |
| Eukaryota | Plantae | Spermatophyta | Arrhenatherum elatius (false oat-grass) | Present | Native | | Tutin et al., 1980 |
| Eukaryota | Plantae | Spermatophyta | Artemisia biennis (biennial wormwood) | Localised | Introduced | | Stace, 1997 |
| Eukaryota | Plantae | Spermatophyta | Arundo donax (giant reed) | Present | Introduced | | USDA-ARS, 2007; Thomas, 2010 |
| Eukaryota | Plantae | Spermatophyta | Avena barbata (slender oat) | Localised | Introduced | Yes | Biological Records Centre, 2012 |
| Eukaryota | Plantae | Spermatophyta | Avena fatua (wild oat) | Widespread | | | Roebuck, 1987 |
| Eukaryota | Plantae | Spermatophyta | Avena sterilis (winter wild oat) | Restricted distribution | Native | | Holm et al., 1979; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Baccharis halimifolia (groundsel-bush) | Restricted distribution | Introduced | | Weber, 2003; Stace, 1991; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Berberis thunbergii (Japanese barberry) | Present | Introduced | | RHS, 1989 |
| Eukaryota | Plantae | Spermatophyta | Bidens frondosa (beggarticks) | Localised | Introduced | Yes | Online Atlas of British and Irish Flora, 2014; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Brachypodium distachyon (purple false brome) | Present | Introduced | | DAISIE, 2016 |
| Eukaryota | Plantae | Spermatophyta | Brachypodium sylvaticum (slender false brome) | Widespread | Native | | Stace, 1997 |
| Eukaryota | Plantae | Spermatophyta | Brassica nigra (black mustard) | Present | Native | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Brassica tournefortii (African mustard) | Present, few occurrences | Introduced | | British and Irish Flora (BIF), 2015 |
| Eukaryota | Plantae | Spermatophyta | Briza maxima (large quaking grass) | Present | Introduced | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Bromus diandrus (great brome) | Present | Introduced | | Royal Botanic Garden Edinburgh, 2004 |
| Eukaryota | Plantae | Spermatophyta | Bromus hordeaceus (soft brome) | Present | Native | | Tropicos, 2013; GBIF, 2012 |
| Eukaryota | Plantae | Spermatophyta | Bromus madritensis (compact brome) | Present | Introduced | | Stace , 1997; Tutin & et al. , 1980; Royal Botanic Garden Edinburgh, 2004 |
| Eukaryota | Plantae | Spermatophyta | Bromus rubens (red brome) | Present | Introduced | | USDA-ARS, 2004 |
| Eukaryota | Plantae | Spermatophyta | Bromus secalinus (rye brome) | Present | Introduced | | Royal Botanic Gardens Kew, 2016 |
| Eukaryota | Plantae | Spermatophyta | Bromus sterilis (barren brome) | Present | Native | Yes | Mortimer et al., 1993; Gibson & Kerchove, 1999; Royal Botanic Garden Edinburgh, 2004; USDA-ARS, 2004 |
| Eukaryota | Plantae | Spermatophyta | Bromus tectorum (downy brome) | Present | Introduced | | Tutin et al., 1980 |
| Eukaryota | Plantae | Spermatophyta | Buddleja davidii (butterfly bush) | Present | Introduced | Yes | GBIF, 2009; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Bunias orientalis (Turkish warty-cabbage) | Present | Introduced | Yes | Clapham et al., 1962; GBIF, 2009; Jehlik & Slavik, 1968 |
| Eukaryota | Plantae | Spermatophyta | Cabomba caroliniana (Carolina fanwort) | Present | Introduced | | GBIF, 2008; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Cannabis sativa (hemp) | Present | | | Karus et al., 2000; FAO, 2000 |
| Eukaryota | Plantae | Spermatophyta | Capsella bursa-pastoris (shepherd's purse) | Present | Native | | Rees & Brown, 1992; HYPPA, 2004 |
| Eukaryota | Plantae | Spermatophyta | Carduus nutans (nodding thistle) | Widespread | Native | | Perring, 2002 |
| Eukaryota | Plantae | Spermatophyta | Carduus pycnocephalus (Italian thistle) | Present, few occurrences | Introduced | | Biological Records Centre, 2013 |
| Eukaryota | Plantae | Spermatophyta | Carpobrotus edulis (hottentot fig) | Present | Introduced | | Royal Botanic Garden Edinburgh, 2008; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Celastrus orbiculatus (Asiatic bittersweet) | Present, few occurrences | Introduced | | Patterson, 1974 |
| Eukaryota | Plantae | Spermatophyta | Cenchrus ciliaris (Buffel grass) | Present only in captivity/cultivation | Introduced | | GBIF, 2012 |
| Eukaryota | Plantae | Spermatophyta | Centaurea debeauxii (meadow knapweed) | Present | Native | | Stace, 2010 |
| Eukaryota | Plantae | Spermatophyta | Centaurea iberica | Absent, formerly present | Introduced | | Clement & Foster, 1994; Dunn, 1905; Fraser, 1905 |
| Eukaryota | Plantae | Spermatophyta | Centaurea macrocephala | Present | Introduced | | Clement & Foster, 1994; Preston et al., 2002 |
| Eukaryota | Plantae | Spermatophyta | Centaurea melitensis | Present | Introduced | | Dunn, 1905 |
| Eukaryota | Plantae | Spermatophyta | Centaurea solstitialis (yellow starthistle) | Present | Introduced | Yes | Tutin et al., 1976 |
| Eukaryota | Plantae | Spermatophyta | Ceratophyllum demersum (coontail) | Widespread | | | Moss et al., 1986; Thomas & Daldorph, 1994 |
| Eukaryota | Plantae | Spermatophyta | Chenopodium album (fat hen) | Widespread | | | Holm et al., 1991 |
| Eukaryota | Plantae | Spermatophyta | Cinnamomum camphora (camphor laurel) | Present | Introduced | | |
| Eukaryota | Plantae | Spermatophyta | Cirsium arvense (creeping thistle) | Present | Native | Yes | Holm et al., 1979; Edwards et al., 2000; USDA-ARS, 2004 |
| Eukaryota | Plantae | Spermatophyta | Cirsium vulgare (spear thistle) | Present | Native | | USDA-ARS, 2016; Holm et al., 1979 |
| Eukaryota | Plantae | Spermatophyta | Clematis vitalba (old man's beard) | Widespread | Native | Yes | Clay & Dixon, 2000; Tutin et al., 1964 |
| Eukaryota | Plantae | Spermatophyta | Conium maculatum (poison hemlock) | Present | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Convolvulus arvensis (bindweed) | Widespread | | | Stace, 1972; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Conyza canadensis (Canadian fleabane) | Present | Introduced | Yes | Cronquist, 1976 |
| Eukaryota | Plantae | Spermatophyta | Conyza sumatrensis (tall fleabane) | Present | Introduced | Yes | Wurzell, 1988 |
| Eukaryota | Plantae | Spermatophyta | Cornus sericea (redosier dogwood) | Present | Introduced | | DAISIE, 2009; EPPO, 2009; Stace et al., 2009 |
| Eukaryota | Plantae | Spermatophyta | Cortaderia jubata (purple pampas grass) | Present only in captivity/cultivation | Introduced | | Royal Horticultural Society, 2009 |
| Eukaryota | Plantae | Spermatophyta | Cortaderia selloana (pampas grass) | Present | Introduced | | DAISIE, 2009; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Cotoneaster horizontalis (wall-spray) | Widespread | Introduced | Yes | BSBI, 2015 |
| Eukaryota | Plantae | Spermatophyta | Crassula helmsii (Australian swamp stonecrop) | Restricted distribution | | | EPPO, 2014; OEPP/EPPO, 2007 |
| Eukaryota | Plantae | Spermatophyta | Crataegus monogyna (hawthorn) | Present | Native | | USDA-ARS, 2007 |
| Eukaryota | Plantae | Spermatophyta | Crypsis schoenoides (swamp pricklegrass) | Present | Introduced | | Randall, 2012 |
| Eukaryota | Plantae | Spermatophyta | Cuscuta campestris (field dodder) | Present | Introduced | | Valentine &, 1972 |
| Eukaryota | Plantae | Spermatophyta | Cuscuta epithymum (alfalfa dodder) | Present | Native | | Valentine &, 1972 |
| Eukaryota | Plantae | Spermatophyta | Cuscuta europaea (European dodder) | Present | Native | | Valentine &, 1972 |
| Eukaryota | Plantae | Spermatophyta | Cymbopogon citratus (citronella grass) | Present | | | Humphrey, 1973 |
| Eukaryota | Plantae | Spermatophyta | Cynara cardunculus (cardoon) | Present | Introduced | | Weeds of Australia, 2016 |
| Eukaryota | Plantae | Spermatophyta | Cynodon dactylon (Bermuda grass) | Present | Introduced | | Tutin et al., 1980 |
| Eukaryota | Plantae | Spermatophyta | Cynoglossum officinale (hound's tongue) | Present | Native | | Cockayne, 1961 |
| Eukaryota | Plantae | Spermatophyta | Cytisus scoparius (Scotch broom) | Widespread | Native | | Heywood & Ball, 1968 |
| Eukaryota | Plantae | Spermatophyta | Dactylis glomerata (cocksfoot) | Present | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Danthonia decumbens (heath grass) | Present | Native | | USDA-ARS, 2015; Thompson, 1986; National Museums Northern Ireland, 2010; Fitter et al., 1989 |
| Eukaryota | Plantae | Spermatophyta | Datura ferox (fierce thornapple) | Present | Introduced | | GBIF, 2014 |
| Eukaryota | Plantae | Spermatophyta | Datura innoxia (downy thorn apple) | Present | Introduced | | GBIF, 2014 |
| Eukaryota | Plantae | Spermatophyta | Datura stramonium (jimsonweed) | Present | | | Moore, 1972; Stace, 1991 |
| Eukaryota | Plantae | Spermatophyta | Delairea odorata (Cape ivy) | Restricted distribution | Introduced | Yes | Hilliard, 1977; Royal Botanic Garden Edinburgh, 2003 |
| Eukaryota | Plantae | Spermatophyta | Descurainia sophia (flixweed) | Present, see datasheet for details | | | |
| Eukaryota | Plantae | Spermatophyta | Digitaria ciliaris (southern crabgrass) | Present, few occurrences | | | Stace, 1991; DAISIE, 2014 |
| Eukaryota | Plantae | Spermatophyta | Dipsacus fullonum (common teasel) | Present | Native | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Dysphania ambrosioides (Mexican tea) | Present | Introduced | | DAISIE, 2013 |
| Eukaryota | Plantae | Spermatophyta | Echinochloa colona (junglerice) | Present | Introduced | | DAISIE, 2014 |
| Eukaryota | Plantae | Spermatophyta | Echinochloa crus-galli (barnyard grass) | Present | | | Hafliger & Scholtz, 1980; DAISIE, 2014 |
| Eukaryota | Plantae | Spermatophyta | Echium plantagineum (Paterson's curse) | Restricted distribution | Native | | Gibbs, 1972 |
| Eukaryota | Plantae | Spermatophyta | Egeria densa (leafy elodea) | Present | Introduced | Yes | Royal Botanic Garden Edinburgh, 2003; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Elaeagnus umbellata (autumn olive) | Present | | | CABI, 2005 |
| Eukaryota | Plantae | Spermatophyta | Eleusine indica (goose grass) | Present, few occurrences | Introduced | | Stace, 1991 |
| Eukaryota | Plantae | Spermatophyta | Elodea canadensis (Canadian pondweed) | Widespread | Introduced | | Sculthorpe, 1971 |
| Eukaryota | Plantae | Spermatophyta | Elodea nuttallii (Nuttall's waterweed) | Present | Introduced | | DAISIE, 2009; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Elymus repens (quackgrass) | Widespread | | | Holm et al., 1991; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Emex spinosa (spiny emex) | Absent, intercepted only | Introduced | | Lousley & Kent, 1981 |
| Eukaryota | Plantae | Spermatophyta | Epilobium ciliatum (northern willowherb) | Widespread | Introduced | Yes | Stace, 2010 |
| Eukaryota | Plantae | Spermatophyta | Erigeron karvinskianus (Karwinsky’s fleabane) | Present | Introduced | Yes | DAISIE, 2012 |
| Eukaryota | Plantae | Spermatophyta | Erodium botrys (long-beaked stork's bill) | Present, few occurrences | Introduced | | Salisbury, 1961 |
| Eukaryota | Plantae | Spermatophyta | Erodium cicutarium (common storksbill) | Present | Native | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Eucalyptus camaldulensis (red gum) | Present | Introduced | | WAC, 2005 |
| Eukaryota | Plantae | Spermatophyta | Euphorbia esula (leafy spurge) | Present | Native | | Blamey & Grey-Wilson, 1989 |
| Eukaryota | Plantae | Spermatophyta | Fallopia convolvulus (black bindweed) | Present | | | Phillipson et al., 1972; Scragg, 1974; Holm et al., 1977; Roberts & Chancellor, 1986; Fisher, 1992 |
| Eukaryota | Plantae | Spermatophyta | Fallopia japonica (Japanese knotweed) | Widespread | Introduced | Yes | Conolly, 1977; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Fallopia sachalinensis (giant knotweed) | Localised | Introduced | Yes | Pashley et al., 2007; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Fallopia x bohemica | Widespread | | | Preston et al., 2002; Bailey et al., 1996; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Festuca arundinacea (tall fescue) | Widespread | Native | | Gibson & Newman, 2001; eMonocot, 2016 |
| Eukaryota | Plantae | Spermatophyta | Festuca pratensis (meadow fescue) | Present | Native | | GrassWorld, 2016; Euro+Med, 2016 |
| Eukaryota | Plantae | Spermatophyta | Ficus microcarpa (Indian laurel tree) | Present | | | |
| Eukaryota | Plantae | Spermatophyta | Foeniculum vulgare (fennel) | Present | Introduced | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Fragaria vesca (wild strawberry) | Present | Native | | Darrow, 1966 |
| Eukaryota | Plantae | Spermatophyta | Frangula alnus (alder buckthorn) | Present | Native | | Tutin et al., 1968 |
| Eukaryota | Plantae | Spermatophyta | Galega officinalis (goatsrue) | Unconfirmed record | | | CAB Abstracts |
| Eukaryota | Plantae | Spermatophyta | Galinsoga parviflora (gallant soldier) | Present | | | DAISIE, 2014; Tutin, 1976 |
| Eukaryota | Plantae | Spermatophyta | Galinsoga quadriradiata (shaggy soldier) | Present | Introduced | | DAISIE, 2014 |
| Eukaryota | Plantae | Spermatophyta | Galium aparine (cleavers) | Widespread | | | Holm et al., 1991 |
| Eukaryota | Plantae | Spermatophyta | Gaultheria shallon (salal) | Widespread | Introduced | Yes | EPPO, 2014; Encyclopedia of Life, 2015; Pojar & Mackinnon, 2004 |
| Eukaryota | Plantae | Spermatophyta | Glechoma hederacea (ground ivy) | Present | Native | | USDA-NRCS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Gleditsia triacanthos (honey locust) | Present | Introduced | | |
| Eukaryota | Plantae | Spermatophyta | Glyceria declinata (small sweet grass) | Widespread | Native | | |
| Eukaryota | Plantae | Spermatophyta | Glyceria maxima (reed sweet-grass) | Present | Native | | USDA-ARS, 2009 |
| Eukaryota | Plantae | Spermatophyta | Gunnera tinctoria (giant rhubarb) | Localised | Introduced | Yes | Global Biodiversity Information Facility, 2008 |
| Eukaryota | Plantae | Spermatophyta | Hedera helix (ivy) | Widespread | Native | | Stace, 1997 |
| Eukaryota | Plantae | Spermatophyta | Hedychium coccineum (scarlet ginger lily) | Present only in captivity/cultivation | Introduced | | Schilling, 1982; Royal Botanic Garden Edinburgh, 2014 |
| Eukaryota | Plantae | Spermatophyta | Hedychium gardnerianum (kahili ginger) | Present, few occurrences | Introduced | | Cronk & Fuller, 1995 |
| Eukaryota | Plantae | Spermatophyta | Helianthus tuberosus (Jerusalem artichoke) | Widespread | Introduced | | Wagenitz, 1980; Stace, 1997; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Heliotropium indicum (Indian heliotrope) | Present | | | Lorenzi & Jeffery, 1987 |
| Eukaryota | Plantae | Spermatophyta | Helminthotheca echioides (bristly oxtongue) | Present | Introduced | | DAISIE, 2015; USDA-ARS, 2016; Greuter, 2006 |
| Eukaryota | Plantae | Spermatophyta | Heracleum mantegazzianum (giant hogweed) | Restricted distribution | Introduced | Yes | Tiley et al., 1996; Brummitt, 1968; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Heracleum persicum (Persian hogweed) | Localised | Introduced | | Jahodová et al., 2007; Rijal et al., 2014 |
| Eukaryota | Plantae | Spermatophyta | Hibiscus trionum (Venice mallow) | Present | | | Holm et al., 1997 |
| Eukaryota | Plantae | Spermatophyta | Hirschfeldia incana (shortpod mustard) | Present | Introduced | | USDA-ARS, 2016 |
| Eukaryota | Plantae | Spermatophyta | Holcus lanatus (common velvet grass) | Widespread | Native | | Phillips, 1994; USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Hydrilla verticillata (hydrilla) | Present, few occurrences | | | Holm et al., 1979; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Hydrocharis morsus-ranae | Present | Native | | USDA-GRIN, 2002 |
| Eukaryota | Plantae | Spermatophyta | Hydrocotyle ranunculoides (floating pennywort) | Restricted distribution | Introduced | Yes | Newman & Dawson, 1999; EPPO, 2013 |
| Eukaryota | Plantae | Spermatophyta | Hyoscyamus niger (black henbane) | Present | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Hypericum perforatum (St John's wort) | Present | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Hypochaeris radicata (cat's ear) | Unconfirmed record | | | USDA-NRCS, 2013; CAB Abstracts |
| Eukaryota | Plantae | Spermatophyta | Impatiens glandulifera (Himalayan balsam) | Widespread | Introduced | Yes | Beerling & Perrins, 1993; Prowse, 1998; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Impatiens parviflora (small balsam) | Widespread | Introduced | | Clement & Foster, 1994 |
| Eukaryota | Plantae | Spermatophyta | Isatis tinctoria (dyers woad) | Present | Introduced | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Juncus effusus (common rush) | Present | Native | | Kirschner, 2002 |
| Eukaryota | Plantae | Spermatophyta | Juncus ensifolius (swordleaf rush) | Present, few occurrences | Introduced | | Kent, 1958; Clement & Foster, 1994; Poland, 2005 |
| Eukaryota | Plantae | Spermatophyta | Juncus planifolius (broadleaf rush) | Last reported 2009 | Introduced | | BSBI, 2012 |
| Eukaryota | Plantae | Spermatophyta | Juncus tenuis (slender rush) | Present | Introduced | | USDA-ARS, 2016 |
| Eukaryota | Plantae | Spermatophyta | Lagarosiphon major (African elodea) | Present | Introduced | | CAPM-CEH, 2004; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Lamium amplexicaule (henbit deadnettle) | Present | Native | Yes | INRA, 2001; Royal Botanic Garden Edinburgh, 2003 |
| Eukaryota | Plantae | Spermatophyta | Lemna minuta | Widespread | Introduced | Yes | DAISIE, 2008; Landolt, 1979 |
| Eukaryota | Plantae | Spermatophyta | Lemna perpusilla (duckweed) | Present | | | Hossel & Baker, 1979 |
| Eukaryota | Plantae | Spermatophyta | Lepidium draba (hoary cress) | Widespread | Native | Yes | Morris, 1982 |
| Eukaryota | Plantae | Spermatophyta | Lepidium latifolium (perennial pepperweed) | Present | Native | | Royal Botanic Garden Edinburgh, 2012 |
| Eukaryota | Plantae | Spermatophyta | Lepidium perfoliatum (clasping pepperweed) | Present | Introduced | | DAISIE, 2016 |
| Eukaryota | Plantae | Spermatophyta | Leptospermum scoparium (manuka) | Present only in captivity/cultivation | Introduced | | Dawson, 2009 |
| Eukaryota | Plantae | Spermatophyta | Leucanthemum vulgare (oxeye daisy) | Present | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Ligustrum lucidum (broad-leaf privet) | Present | Introduced | | GBIF, 2016 |
| Eukaryota | Plantae | Spermatophyta | Ligustrum sinense (Chinese privet) | Present | Introduced | | Weber, 2003 |
| Eukaryota | Plantae | Spermatophyta | Ligustrum vulgare (common privet) | Present | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Linaria dalmatica (dalmatian toadflax) | Present | Introduced | | Stace, 1991; Leo's Dictionaries, 2015 |
| Eukaryota | Plantae | Spermatophyta | Linaria vulgaris (common toadflax) | Present | Native | | USDA-ARS, 2015; Holm et al., 1979 |
| Eukaryota | Plantae | Spermatophyta | Lolium multiflorum (Italian ryegrass) | Present | Introduced | | Holm et al., 1991 |
| Eukaryota | Plantae | Spermatophyta | Lolium perenne (perennial ryegrass) | Present | Native | | eMonocot, 2013 |
| Eukaryota | Plantae | Spermatophyta | Lolium temulentum (darnel) | Widespread | Introduced | | Roderick & Thomas, 1997; Thomas et al., 1997 |
| Eukaryota | Plantae | Spermatophyta | Lonicera japonica (Japanese honeysuckle) | Present | Introduced | | Clapham et al., 1962 |
| Eukaryota | Plantae | Spermatophyta | Lonicera maackii (Amur honeysuckle) | Present only in captivity/cultivation | Introduced | | Luken & Thieret, 1997; Royal Botanic Gardens Kew, 2013 |
| Eukaryota | Plantae | Spermatophyta | Ludwigia peploides (water primrose) | Localised | Introduced | Yes | CEH, 2007; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Lupinus polyphyllus (garden lupin) | Present | Introduced | | NOBANIS, 2015; ILDIS, 2015; EPPO, 2015; DAISIE, 2016 |
| Eukaryota | Plantae | Spermatophyta | Lysichiton americanus (American skunk cabbage) | Restricted distribution | | | EPPO, 2014; Preston CD Pearman DA Dines TD, 2002; Clement & Foster, 1994; Flora of Derbyshire, 2003 |
| Eukaryota | Plantae | Spermatophyta | Lythrum salicaria (purple loosestrife) | Present | Native | | Royal Botanic Garden Edinburgh, 2007 |
| Eukaryota | Plantae | Spermatophyta | Mahonia aquifolium (Oregongrape) | Present | Introduced | | GBIF, 2010 |
| Eukaryota | Plantae | Spermatophyta | Malva pusilla (round-leaved mallow) | Present | Introduced | | DAISIE, 2014 |
| Eukaryota | Plantae | Spermatophyta | Marrubium vulgare (horehound) | Present | Native | | GBIF, 2013 |
| Eukaryota | Plantae | Spermatophyta | Medicago polymorpha (bur clover) | Present | Introduced | | Clapham et al., 1962 |
| Eukaryota | Plantae | Spermatophyta | Melia azedarach (Chinaberry) | Present | Introduced | | World Agroforestry Centre, 2002 |
| Eukaryota | Plantae | Spermatophyta | Melilotus albus (honey clover) | Unconfirmed record | | | ; DAISIE, 2008 |
| Eukaryota | Plantae | Spermatophyta | Mentha pulegium (pennyroyal) | Present | | | USDA-ARS, 2013; Datamining 2011 - Invasive Species Databases |
| Eukaryota | Plantae | Spermatophyta | Merremia tuberosa (woodrose) | Present | Introduced | | ISSG, 2014 |
| Eukaryota | Plantae | Spermatophyta | Miconia calvescens (miconia) | Present only in captivity/cultivation | Introduced | | ISSG, 2011 |
| Eukaryota | Plantae | Spermatophyta | Microlaena stipoides (meadow rice grass, meadow ricegrass) | Present, few occurrences | Introduced | | Biological Records Centre, 2012 |
| Eukaryota | Plantae | Spermatophyta | Miscanthus sinensis (eulalia) | Present, few occurrences | Introduced | | GBIF, 2008; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Morus nigra (black mulberry) | Present | Introduced | | Randall, 2012 |
| Eukaryota | Plantae | Spermatophyta | Myriophyllum aquaticum (parrot's feather) | Localised | Introduced | Yes | Orchard, 1981; Maskell et al., 2006; Chicken, 1977; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Myriophyllum heterophyllum (broadleaf watermilfoil) | Eradicated | Introduced | | Stace, 1991; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Myriophyllum spicatum (spiked watermilfoil) | Present | Native | | Murphy et al., 1993; Wade, 1999 |
| Eukaryota | Plantae | Spermatophyta | Nandina domestica (Nandina) | Present only in captivity/cultivation | Introduced | | Royal Botanic Gardens Kew, 2013 |
| Eukaryota | Plantae | Spermatophyta | Nassella trichotoma (serrated tussock grass) | Present | Introduced | Yes | Campbell, 1982; Campbell & Vere, 1995 |
| Eukaryota | Plantae | Spermatophyta | Nasturtium officinale (watercress) | Present | Native | | USDA-ARS, 2006 |
| Eukaryota | Plantae | Spermatophyta | Nicotiana glauca (tree tobacco) | Present | Introduced | Yes | ISSG, 2013 |
| Eukaryota | Plantae | Spermatophyta | Nicotiana tabacum (tobacco) | Present | Introduced | | Randall, 2012 |
| Eukaryota | Plantae | Spermatophyta | Nymphoides peltata (yellow floating-heart) | Present | Native | | USDA-ARS, 2008 |
| Eukaryota | Plantae | Spermatophyta | Onopordum acanthium (scotch thistle) | Present | Native | | Tutin et al., 1976; Holm et al., 1979 |
| Eukaryota | Plantae | Spermatophyta | Orobanche crenata (crenate broomrape) | Restricted distribution | | | ter Borg, 1994 |
| Eukaryota | Plantae | Spermatophyta | Orobanche minor (common broomrape) | Present | Native | | Chater & Webb, 1972 |
| Eukaryota | Plantae | Spermatophyta | Orobanche ramosa (branched broomrape) | Localised | Introduced | | Chater & Webb, 1972 |
| Eukaryota | Plantae | Spermatophyta | Oxalis corniculata (creeping woodsorrel) | Widespread | Introduced | Yes | Biological Records Centre, 2013 |
| Eukaryota | Plantae | Spermatophyta | Oxalis latifolia (sorrel) | Indigenous, localized | | | Valentine, 1968 |
| Eukaryota | Plantae | Spermatophyta | Oxalis pes-caprae (Bermuda buttercup) | Present | | | Valentine, 1968; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Parentucellia viscosa (yellow glandweed) | Present | Native | | Biological Records Centre, 2013 |
| Eukaryota | Plantae | Spermatophyta | Paspalum distichum (knotgrass) | Localised | Introduced | | Stace, 1991 |
| Eukaryota | Plantae | Spermatophyta | Pastinaca sativa (parsnip) | Present | Native | | Euro+Med PlantBase, 2011; Tutin, 1980 |
| Eukaryota | Plantae | Spermatophyta | Paulownia tomentosa (paulownia) | Present | | | CABI, 2005 |
| Eukaryota | Plantae | Spermatophyta | Pennisetum macrourum (African feather grass) | Present | | | Weber, 2003 |
| Eukaryota | Plantae | Spermatophyta | Persicaria wallichii (Himalayan knotweed) | Widespread | Introduced | Yes | Rich & Woodruff, 1996 |
| Eukaryota | Plantae | Spermatophyta | Phalaris aquatica (bulbous canarygrass) | Present | Introduced | | USDA-ARS, 2015; Online Atlas of the British and Irish Flora, 2015 |
| Eukaryota | Plantae | Spermatophyta | Phalaris arundinacea (reed canary grass) | Present | Native | | Daniels, 1978; Holm et al., 1979; USDA-ARS2003 |
| Eukaryota | Plantae | Spermatophyta | Phalaris minor (littleseed canarygrass) | Present | | | Bhan & Froud-Williams, 2006 |
| Eukaryota | Plantae | Spermatophyta | Phalaris paradoxa (awned canary-grass) | Present | Introduced | Yes | Biological Records Centre, 2015; Holm et al., 1991 |
| Eukaryota | Plantae | Spermatophyta | Phleum pratense (timothy grass) | Widespread | Native | | Kew, 2015 |
| Eukaryota | Plantae | Spermatophyta | Phormium tenax (New Zealand flax) | Localised | Introduced | Yes | Stace, 2010 |
| Eukaryota | Plantae | Spermatophyta | Phragmites australis (common reed) | Present | | | Holm et al., 1991 |
| Eukaryota | Plantae | Spermatophyta | Phyllostachys aurea (golden bamboo) | Present | Introduced | | USDA-APHIS, 2012 |
| Eukaryota | Plantae | Spermatophyta | Phyllostachys aureosulcata (yellow groove bamboo) | Present | Introduced | | EPPO, 2016 |
| Eukaryota | Plantae | Spermatophyta | Physalis peruviana (Cape gooseberry) | Localised | Introduced | | Stace, 1991 |
| Eukaryota | Plantae | Spermatophyta | Pilosella aurantiaca (orange hawkweed) | Present | Introduced | | Sell & West, 1976 |
| Eukaryota | Plantae | Spermatophyta | Pilosella caespitosa (yellow hawkweed) | Restricted distribution | Introduced | | Sell & West, 1976; Gottschlich, 1996 |
| Eukaryota | Plantae | Spermatophyta | Pilosella officinarum (mouse-ear hawkweed) | Present | Native | | Sell & West, 1976; Meusel & JSger, 1992 |
| Eukaryota | Plantae | Spermatophyta | Pimenta dioica (allspice) | Present only under cover/indoors | Introduced | | Parthasarathy et al., 2008 |
| Eukaryota | Plantae | Spermatophyta | Pinus contorta (lodgepole pine) | Present | | | Shaw & Usher, 1996 |
| Eukaryota | Plantae | Spermatophyta | Pinus pinaster (maritime pine) | Present | Introduced | | Mitchell, 1974; Royal Botanic Garden Edinburgh, 2007 |
| Eukaryota | Plantae | Spermatophyta | Plantago coronopus (Buck's-horn plantain) | Present | Native | | USDA-ARS, 2012 |
| Eukaryota | Plantae | Spermatophyta | Plantago lanceolata (ribwort plantain) | Present | Native | | Roberts & Boddrell, 1984; Holm et al., 1979; Mohd Norowi, 1999 |
| Eukaryota | Plantae | Spermatophyta | Plantago major (broad-leaved plantain) | Present | | | Bastin & Thomas, 1999; Holm et al., 1979 |
| Eukaryota | Plantae | Spermatophyta | Poa annua (annual meadowgrass) | Widespread | | | Holm et al., 1991; Preston et al., 2002; Edmondson, 1980 |
| Eukaryota | Plantae | Spermatophyta | Poa compressa (Canada bluegrass) | Widespread | Native | | Royal Botanic Gardens Kew, 2015 |
| Eukaryota | Plantae | Spermatophyta | Poa nemoralis (wood bluegrass) | Present | Native | | Ryves et al., 1996; USDA-ARS, 2016; Farmer, 2004; Online Atlas of the British and Irish Flora, 2016 |
| Eukaryota | Plantae | Spermatophyta | Poa pratensis (smooth meadow-grass) | Widespread | Native | | Phillips, 1980; ISSG, 2015 |
| Eukaryota | Plantae | Spermatophyta | Polycarpon tetraphyllum (fourleaf allseed) | Present, few occurrences | Native | | Stace, 2010 |
| Eukaryota | Plantae | Spermatophyta | Polygonum arenastrum (common knotweed) | Present | Native | | GBIF, 2015 |
| Eukaryota | Plantae | Spermatophyta | Polygonum aviculare (prostrate knotweed) | Widespread | | | Holm et al., 1979 |
| Eukaryota | Plantae | Spermatophyta | Polygonum hydropiper (marsh pepper) | Present | | | Hafliger & Wolf, 1988 |
| Eukaryota | Plantae | Spermatophyta | Polygonum lapathifolium (pale persicaria) | Widespread | | | TUTIN & ET, 1964; Holm et al., 1979; GRIN, 1999 |
| Eukaryota | Plantae | Spermatophyta | Polygonum nepalense (Nepal persicaria) | Restricted distribution | | | Stace, 1991 |
| Eukaryota | Plantae | Spermatophyta | Polygonum persicaria (redshank) | Present | Native | Yes | Simmonds, 1946; INRA, 2001; Royal Botanic Garden Edinburgh, 2003 |
| Eukaryota | Plantae | Spermatophyta | Polypogon monspeliensis (annual beard grass) | Present | Native | | Hubbard, 1984 |
| Eukaryota | Plantae | Spermatophyta | Populus alba (silver-leaf poplar) | Present | | | CABI, 2005 |
| Eukaryota | Plantae | Spermatophyta | Populus nigra (black poplar) | Present | | | |
| Eukaryota | Plantae | Spermatophyta | Portulaca oleracea (purslane) | Present | Introduced | | Walters, 1964 |
| Eukaryota | Plantae | Spermatophyta | Potamogeton crispus (curlyleaf pondweed) | Present | Native | | EUNIS, 2008 |
| Eukaryota | Plantae | Spermatophyta | Prunella vulgaris (self-heal) | Widespread | Native | Yes | WCSP, 2016; Fitter et al., 1980; Rose, 2006 |
| Eukaryota | Plantae | Spermatophyta | Prunus serotina (black cherry) | Present | Introduced | Yes | Cronk & Fuller , 1995; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Psidium cattleianum (strawberry guava) | Present, few occurrences | Introduced | | Diong, 1998 |
| Eukaryota | Plantae | Spermatophyta | Raphanus raphanistrum (wild radish) | Widespread | | | Holm et al., 1991; Chater &, 1981; USDA, 1998 |
| Eukaryota | Plantae | Spermatophyta | Rhamnus cathartica (buckthorn) | Present | Native | | Tutin et al., 1968 |
| Eukaryota | Plantae | Spermatophyta | Rhaponticum repens (Russian knapweed) | Present | | | EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Rhododendron ponticum (rhododendron) | Widespread | Introduced | Yes | Elton, 1958; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Ricinus communis (castor bean) | Present | Introduced | | DAISIE, 2014 |
| Eukaryota | Plantae | Spermatophyta | Robinia pseudoacacia (black locust) | Present | Introduced | Yes | |
| Eukaryota | Plantae | Spermatophyta | Rosa multiflora (Multiflora rose) | Present | | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Rosa rugosa (rugosa rose) | Present | Introduced | | UK Royal Botanic Garden Edinburgh, 2009; Bruun, 2005 |
| Eukaryota | Plantae | Spermatophyta | Rosmarinus officinalis (rosemary) | Present | Introduced | | Hanelt et al., 2001 |
| Eukaryota | Plantae | Spermatophyta | Rubus armeniacus (Himalayan blackberry) | Present | Introduced | | Allen, 2003 |
| Eukaryota | Plantae | Spermatophyta | Rubus fruticosus (blackberry) | Present | Native | | Royal Botanic Garden Edinburgh, 2003 |
| Eukaryota | Plantae | Spermatophyta | Rubus parviflorus (thimbleberry) | Present | Introduced | Yes | DAISIE, 2015 |
| Eukaryota | Plantae | Spermatophyta | Rudbeckia laciniata (cutleaf coneflower) | Present | Introduced | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Rumex acetosella (sheep's sorrel) | Present | Native | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Rumex crispus (curled dock) | Present | | | Rechinger & Akeroyd, 1993 |
| Eukaryota | Plantae | Spermatophyta | Rumex obtusifolius (broad-leaved dock) | Present | Native | Yes | Holm et al., 1979 |
| Eukaryota | Plantae | Spermatophyta | Sagittaria latifolia (broadleaf arrowhead) | Present | Introduced | | Preston & Croft, 1997 |
| Eukaryota | Plantae | Spermatophyta | Salix cinerea (grey sallow) | Localised | Native | | USDA-ARS, 2008 |
| Eukaryota | Plantae | Spermatophyta | Salix fragilis (crack willow) | Present | Native | | |
| Eukaryota | Plantae | Spermatophyta | Salsola kali (common saltwort) | Present | Native | | USDA-ARS, 2015; USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Sambucus nigra (elder) | Widespread | Native | | Royal Botanic Garden Edinburgh, 2003 |
| Eukaryota | Plantae | Spermatophyta | Senecio inaequidens (South African ragwort) | Present | Introduced | | Hayward & Druce, 1919; Lousley, 1961; MacPherson, 1997; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Senecio jacobaea (common ragwort) | Widespread | Native | Yes | Chater & Walters, 1976; Stace, 1997 |
| Eukaryota | Plantae | Spermatophyta | Senecio vulgaris | Widespread | Native | Yes | Chater & Walters, 1976; Stace, 1997 |
| Eukaryota | Plantae | Spermatophyta | Setaria parviflora (knotroot foxtail) | Localised | Introduced | | Ryves et al., 1996 |
| Eukaryota | Plantae | Spermatophyta | Setaria verticillata (bristly foxtail) | Present | | | Sell & Murrell, 1996 |
| Eukaryota | Plantae | Spermatophyta | Setaria viridis (green foxtail) | Restricted distribution | | | Holm et al., 1979 |
| Eukaryota | Plantae | Spermatophyta | Sicyos angulatus (burcucumber) | Present | | | EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Silene gallica (common catchfly) | Present | Native | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Silene latifolia subsp. alba (white campion) | Present | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Silybum marianum (variegated thistle) | Present | Introduced | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Sisymbrium irio | Present | Introduced | | USDA-ARS, 2013 |
| Eukaryota | Plantae | Spermatophyta | Solanum elaeagnifolium (silverleaf nightshade) | Absent, formerly present | | | EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Solanum nigrum (black nightshade) | Present | | | |
| Eukaryota | Plantae | Spermatophyta | Solanum rostratum (prickly nightshade) | Present | Introduced | | Vallejo-Marin, 2014 |
| Eukaryota | Plantae | Spermatophyta | Solanum tuberosum (potato) | Present | Introduced | | Randall, 2012 |
| Eukaryota | Plantae | Spermatophyta | Solidago canadensis (Canadian goldenrod) | Present | Introduced | Yes | Royal Botanic Garden Edinburgh, 2014; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Solidago gigantea (giant goldenrod) | Present | Introduced | Yes | Royal Botanic Garden Edinburgh, 2003; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Soliva sessilis | Present | Introduced | | GBIF, 2009 |
| Eukaryota | Plantae | Spermatophyta | Sonchus arvensis (perennial sowthistle) | Widespread | | | EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Sonchus oleraceus (common sowthistle) | Present | Native | | Boulos, 1976; USDA-ARS, 2014 |
| Eukaryota | Plantae | Spermatophyta | Sorghum halepense (Johnson grass) | Restricted distribution | Introduced | | Stace, 1991 |
| Eukaryota | Plantae | Spermatophyta | Spartina alterniflora (smooth cordgrass) | Present | Introduced | Yes | Mullins & Marks, 1987; Maskell & Raybould, 2001 |
| Eukaryota | Plantae | Spermatophyta | Spartina anglica (common cordgrass) | Present | | Yes | Hubbard, 1970; Hannaford et al., 2006; Davidson et al., 1991; Doody, 1990; Frid et al., 1999; Garnett et al., 1992; Gray et al., 1991; Gray et al., 1997; Hammond & Cooper, 2001; Thompson, 1991 |
| Eukaryota | Plantae | Spermatophyta | Spergula arvensis (corn spurry) | Widespread | | | Holm et al., 1991; Ratter & Akeroyd, 1993 |
| Eukaryota | Plantae | Spermatophyta | Sporobolus africanus (rat’s tail grass) | Present | Introduced | | Online Atlas of the British & Irish Flora, 2016 |
| Eukaryota | Plantae | Spermatophyta | Stachys arvensis (staggerweed) | Present | Introduced | | Randall, 2012; DAISIE, 2014; Govaerts, 2014; USDA-ARS, 2014 |
| Eukaryota | Plantae | Spermatophyta | Stellaria media (common chickweed) | Widespread | | | Holm et al., 1977; Holm et al., 1991; Chater & Heywood, 1972 |
| Eukaryota | Plantae | Spermatophyta | Tanacetum vulgare (tansy) | Widespread | Native | | Heywood, 1976 |
| Eukaryota | Plantae | Spermatophyta | Taraxacum officinale complex (dandelion) | Present | Introduced | | Champness & Morris, 1948; Bostock & Benton, 1979; Westerman & Roddick, 1981; Wilman & Derrick, 1994; Holm et al., 1997 |
| Eukaryota | Plantae | Spermatophyta | Tetragonia tetragonioides (New Zealand spinach) | Localised | Introduced | | Hanson & Mason, 1985 |
| Eukaryota | Plantae | Spermatophyta | Thlaspi arvense (field pennycress) | Present | | | Holm et al., 1991; Clapham, 1972; USDA et al., 1998 |
| Eukaryota | Plantae | Spermatophyta | Typha angustifolia (lesser bulrush) | Present | | | Holm et al., 1991; Chambers et al., 2008; Linton & Goulder, 2003 |
| Eukaryota | Plantae | Spermatophyta | Typha latifolia (broadleaf cattail) | Present | Native | | USDA-ARS, 2010 |
| Eukaryota | Plantae | Spermatophyta | Typha x glauca (hybrid cattail) | Present | Native | | Lousley & Tutin, 1947 |
| Eukaryota | Plantae | Spermatophyta | Ulex europaeus (gorse) | Widespread | Native | Yes | Holm et al., 1997; ILDIS, 2007 |
| Eukaryota | Plantae | Spermatophyta | Urochloa platyphylla (broadleaf signalgrass) | Present | Introduced | | DAISIE, 2014 |
| Eukaryota | Plantae | Spermatophyta | Urtica dioica (stinging nettle) | Widespread | Native | | USDA-ARS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Urtica urens (annual nettle) | Widespread | | | Holm et al., 1997 |
| Eukaryota | Plantae | Spermatophyta | Vallisneria spiralis (eelweed) | Present | Introduced | | Preston & Croft, 1997; Harris & Lording, 1973 |
| Eukaryota | Plantae | Spermatophyta | Ventenata dubia (North Africa grass) | Present | Introduced | Yes | Copping, 1987 |
| Eukaryota | Plantae | Spermatophyta | Verbascum thapsus (common mullein) | Present | Native | | ISSG, 2014 |
| Eukaryota | Plantae | Spermatophyta | Verbena litoralis (blue vervain) | Present | Introduced | | Clement & Foster, 1994 |
| Eukaryota | Plantae | Spermatophyta | Verbena rigida (stiff verbena) | Present, few occurrences | Introduced | | Macpherson, 1993; Don, 1833 |
| Eukaryota | Plantae | Spermatophyta | Verbesina encelioides (golden crownbeard) | Present | Introduced | | Euro+Med, 2012; EPPO, 2014 |
| Eukaryota | Plantae | Spermatophyta | Vernicia fordii (tung-oil tree) | Present | | | |
| Eukaryota | Plantae | Spermatophyta | Vicia villosa (hairy vetch) | Present | Introduced | | ILDIS, 2015 |
| Eukaryota | Plantae | Spermatophyta | Vulpia bromoides (squirreltail fescue) | Widespread | Native | | Hubbard, 1984 |
| Eukaryota | Plantae | Spermatophyta | Vulpia myuros (annual fescue) | Present | Native | | Royal Botanic Garden Edinburgh, 2013 |
| Eukaryota | Plantae | Spermatophyta | Wisteria sinensis (Chinese wisteria) | Present only in captivity/cultivation | Introduced | | GBIF, 2013; Woolverton, 1903 |
| Eukaryota | Plantae | Spermatophyta | Xanthium spinosum (bathurst burr) | Present | Introduced | | GBIF, 2013 |
| Eukaryota | Plantae | Spermatophyta | Zelkova serrata (Japanese selkova) | Present | | | |
| Eukaryota | Plantae | Spermatophyta | Zingiber montanum (cassumunar ginger) | Present | Introduced | | Pereira & Carson, 1852; Sims, 1812 |
| Eukaryota | Plantae | Streptophyta | Campylopus introflexus | Present | Introduced | | Richards, 1963 |
| Eukaryota | Protista | Paramyxea | Marteilia refringens | Present | | | Murray et al., 2012 |
| Eukaryota | Protista | Protozoa | Alexandrium minutum | Localised | | | Nascimento et al., 2005 |
| Eukaryota | Protista | Protozoa | Babesia canis | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Protista | Protozoa | Babesia equi | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Eukaryota | Protista | Protozoa | Bonamia ostreae | Present | | | Laing et al., 2014 |
| Eukaryota | Protista | Protozoa | Plasmodium relictum | Present | Native | | Beadell et al., 2006; Wood et al., 2007; Cosgrove et al., 2008 |
| Eukaryota | Protista | Protozoa | Toxoplasma gondii | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Eukaryota | Protista | Protozoa | Tritrichomonas foetus | Last reported 1991 | | | OIE Handistatus, 2005 |
| Eukaryota | Protista | Protozoa | Trypanosoma equiperdum | Disease never reported | | | OIE Handistatus, 2005 |
| Eukaryota | Protista | Protozoa | Trypanosoma evansi | No information available | | | OIE Handistatus, 2005 |
| Virus | | | African horse sickness virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | African swine fever virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | alcelaphine herpesvirus 1 | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | Arterivirus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | avian infectious bronchitis virus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | Avipoxvirus | Present | | | JENNINGS, 1954; Nuttall et al., 1985; Edwards, 1955; Green, 1969; Kear & Brown, 1976; Keymer & Blackmore, 1964; Miles & Stocker, 1948; Pomeroy, 1962; Poulding, 1960 |
| Virus | | | Barley yellow dwarf viruses (barley yellow dwarf) | Widespread | | | Henry et al., 1993; Plumb, 1995; EPPO, 2014; CMI, 1969 |
| Virus | | | bluetongue virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | bovine herpesvirus 1 | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | bovine leukemia virus | Last reported 1996 | | | OIE Handistatus, 2005 |
| Virus | | | bovine viral diarrhea virus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | caprine arthritis encephalitis virus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | Chrysanthemum stem necrosis virus | Eradicated | | | CABI/EPPO, 2005; IPPC, 2010; EPPO, 2011; EPPO, 2014 |
| Virus | | | classical swine fever virus | Last reported 2000 | | | OIE Handistatus, 2005 |
| Virus | | | duck hepatitis A virus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | Elm mottle virus | Widespread | Native | Yes | Thomas et al., 1983; Jones, 1974; CABI/EPPO, 2004; EPPO, 2014 |
| Virus | | | equine arteritis virus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | equine infectious anaemia virus | Last reported 1976 | | | OIE Handistatus, 2005 |
| Virus | | | equine influenzavirus | No information available | | | OIE Handistatus, 2005 |
| Virus | | | foot-and-mouth disease virus | Last reported 2001 | | | OIE Handistatus, 2005 |
| Virus | | | Gallid herpesvirus 2 | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | Grapevine virus A (grapevine closterovirus) | Present | | | Saldarelli et al., 2005; Immanuel et al., 2015 |
| Virus | | | infectious bursal disease virus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | infectious haematopoietic necrosis virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | infectious pancreatic necrosis virus | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Virus | | | infectious salmon anemia virus | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Virus | | | influenza A virus | Last reported 1992 | | | OIE Handistatus, 2005 |
| Virus | | | Iris yellow spot virus (iris yellow spot) | Present, few occurrences | | | EPPO, 2014; Mumford et al., 2008; CABI/EPPO, 2014 |
| Virus | | | Japanese encephalitis virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | lumpy skin disease virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | myxoma virus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | Nairobi sheep disease virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | Pepino mosaic virus | Present, few occurrences | | | EPPO, 2014; CABI/EPPO, 2015 |
| Virus | | | Pepper mild mottle virus (PMMV) | Present | | | Fletcher, 1984; Brunt, 1986; CABI/EPPO, 2009; VIDE, 1996 |
| Virus | | | peste des petits ruminants virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | Plum pox virus (sharka) | Restricted distribution | Introduced | | CABI/EPPO, 2007; EPPO, 2014 |
| Virus | | | porcine epidemic diarrhea virus | Present | | | Pritchard et al., 1999 |
| Virus | | | Potato spindle tuber viroid (spindle tuber of potato) | Transient: actionable, under eradication | | | EPPO, 2014; IPPC, 2011; EPPO, 2011; CABI/EPPO, 2014 |
| Virus | | | rabbit hemorrhagic disease virus | Reported present or known to be present | | | OIE Handistatus, 2005 |
| Virus | | | rabies virus | Last reported 2002 | | | OIE Handistatus, 2005 |
| Virus | | | Rift Valley fever virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | rinderpest virus | Last reported 1877 | | | OIE Handistatus, 2005 |
| Virus | | | spring viraemia of carp virus | See datasheet for status | | | |
| Virus | | | Strawberry vein banding virus (vein banding of strawberry) | Absent, intercepted only | | | EPPO, 2014 |
| Virus | | | Suid herpesvirus 1 | Last reported 1989 | | | OIE Handistatus, 2005 |
| Virus | | | swine vesicular disease virus | Last reported 1982 | | | OIE Handistatus, 2005 |
| Virus | | | Taura syndrome virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | Tomato yellow leaf curl virus (leaf curl) | Absent, no pest record | | | EPPO, 2014 |
| Virus | | | transmissible gastroenteritis virus | Present | | | CAB ABSTRACTS Data Mining 2001 |
| Virus | | | Venezuelan equine encephalitis virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | vesicular stomatitis virus | Disease never reported | | | OIE Handistatus, 2005 |
| Virus | | | viral hemorrhagic septicaemia virus | See datasheet for status | | | |
| Virus | | | visna/maedi virus | Reported present or known to be present | | | OIE Handistatus, 2005 |