Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Datasheet

Colletotrichum acutatum
(black spot of strawberry)

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Datasheet

Colletotrichum acutatum (black spot of strawberry)

Summary

  • Last modified
  • 10 December 2019
  • Datasheet Type(s)
  • Invasive Species
  • Pest
  • Natural Enemy
  • Preferred Scientific Name
  • Colletotrichum acutatum
  • Preferred Common Name
  • black spot of strawberry
  • Taxonomic Tree
  • Domain: Eukaryota
  •   Kingdom: Fungi
  •     Phylum: Ascomycota
  •       Subphylum: Pezizomycotina
  •         Class: Sordariomycetes

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Pictures

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PictureTitleCaptionCopyright
Colletotrichum acutatum (black spot of strawberry); symptoms on a strawberry fruit. Brazil. October 2015.
TitleSymptoms
CaptionColletotrichum acutatum (black spot of strawberry); symptoms on a strawberry fruit. Brazil. October 2015.
Copyright©Jonas Janner Hamann/Universidade Federal de Santa Maria (UFSM)/Bugwood.org - CC BY 3.0 US
Colletotrichum acutatum (black spot of strawberry); symptoms on a strawberry fruit. Brazil. October 2015.
SymptomsColletotrichum acutatum (black spot of strawberry); symptoms on a strawberry fruit. Brazil. October 2015.©Jonas Janner Hamann/Universidade Federal de Santa Maria (UFSM)/Bugwood.org - CC BY 3.0 US
Colletotrichum acutatum (black spot of strawberry); symptoms on a strawberry fruit. Brazil. October 2015.
TitleSymptoms
CaptionColletotrichum acutatum (black spot of strawberry); symptoms on a strawberry fruit. Brazil. October 2015.
Copyright©Jonas Janner Hamann/Universidade Federal de Santa Maria (UFSM)/Bugwood.org - CC BY 3.0 US
Colletotrichum acutatum (black spot of strawberry); symptoms on a strawberry fruit. Brazil. October 2015.
SymptomsColletotrichum acutatum (black spot of strawberry); symptoms on a strawberry fruit. Brazil. October 2015.©Jonas Janner Hamann/Universidade Federal de Santa Maria (UFSM)/Bugwood.org - CC BY 3.0 US
Colletotrichum acutatum (black spot of strawberry); symptoms on eggplant (Solanum melongena). USA.
TitleSymptoms
CaptionColletotrichum acutatum (black spot of strawberry); symptoms on eggplant (Solanum melongena). USA.
Copyright©Cesar Calderon/Cesar Calderon Pathology Collection/USDA APHIS PPQ/Bugwood.org - CC BY 3.0 US
Colletotrichum acutatum (black spot of strawberry); symptoms on eggplant (Solanum melongena). USA.
SymptomsColletotrichum acutatum (black spot of strawberry); symptoms on eggplant (Solanum melongena). USA.©Cesar Calderon/Cesar Calderon Pathology Collection/USDA APHIS PPQ/Bugwood.org - CC BY 3.0 US

Identity

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Preferred Scientific Name

  • Colletotrichum acutatum Simmonds ex Simmonds

Preferred Common Name

  • black spot of strawberry

Other Scientific Names

  • Colletotrichum xanthii Halsted

International Common Names

  • English: crown rot (of anemone and celery); leaf curl of anemone; post-bloom fruit drop of citrus; terminal crook disease (of pine)
  • Spanish: antracnosis del fresón; manchas negras del fresón
  • French: anthracnose du fraisier; taches noires du fraisier

EPPO code

  • COLLAC (Glomerella acutata)

Taxonomic Tree

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  • Domain: Eukaryota
  •     Kingdom: Fungi
  •         Phylum: Ascomycota
  •             Subphylum: Pezizomycotina
  •                 Class: Sordariomycetes
  •                     Subclass: Sordariomycetidae
  •                         Family: Glomerellaceae
  •                             Genus: Colletotrichum
  •                                 Species: Colletotrichum acutatum

Notes on Taxonomy and Nomenclature

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The classification of the genus Colletotrichum is currently very unsatisfactory, and several species occur on the principal economic host (strawberry) which are regularly confused. As well as C. acutatum, these include the Glomerella cingulata anamorphs C. fragariae and C. gloeosporioides, all of which can be distinguished by isoenzyme analysis (Bonde et al., 1991). Studies are continuing. Colletotrichum xanthii appears to be an earlier name for C. acutatum, but more research is necessary before it is adopted in plant pathology circles.

Description

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Colonies in culture are usually white, pale grey or pale orange, sometimes producing strong pinkish-purple pigments. Conidiomata are usually poorly developed, with few or no setae, especially in culture. Conidiogenous cells are roughly cylindrical, sometimes borne in weak clusters, and produce conidia successively from single loci. Conidia are 8-16 x 2.5-4 µm in size, fusiform, thin-walled, aseptate and hyaline. Appressoria are few in number, 6.5-11 x 4.5-7.5 µm in size, clavate to circular and light to dark brown.

Full descriptions are given by Dyko and Mordue (1979), Sutton (1980), Baxter et al. (1983) and Gunnell and Gubler (1992).

Distribution

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Some country records may refer instead to the Glomerella cingulata-Colletotrichum fragariae aggregate.

A record of C. acutatum in Chile (EPPO, 2009; CABI/EPPO, 2010) published in previous versions of the Compendium has been removed as the pathogen in the original source (Peredo et al., 1979) is now confirmed as a separate species, Colletotrichum pseudoacutatum (Damm et al., 2012). C. acutatum is a quarantine pest for Chile (Servicio Agrícola y Ganadero, 2013).

Distribution Table

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The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.

Last updated: 23 Apr 2020
Continent/Country/Region Distribution Last Reported Origin First Reported Invasive Reference Notes

Africa

Congo, Republic of thePresentCABI and EPPO (2010)
EgyptPresentCABI and EPPO (2010); EPPO (2020)
EthiopiaPresentEPPO (2020); CABI and EPPO (2010)
KenyaPresentEPPO (2020); CABI and EPPO (2010)
MauritiusPresentCABI and EPPO (2010)
NigeriaPresentEPPO (2020); CABI and EPPO (2010)
South AfricaPresentEPPO (2020); CABI and EPPO (2010)
TanzaniaPresentEPPO (2020); CABI and EPPO (2010)
TunisiaPresentSayeh et al. (2016)
UgandaPresentCABI and EPPO (2010)
ZimbabwePresentEPPO (2020); CABI and EPPO (2010)

Asia

ChinaPresentEPPO (2020); CABI and EPPO (2010)
-ChongqingPresentChen et al. (2016)
-FujianPresentCABI and EPPO (2010); EPPO (2020)
-HainanPresentEPPO (2020); CABI and EPPO (2010)
-HenanPresentCABI and EPPO (2010)
-HubeiPresentEPPO (2020); CABI and EPPO (2010)
-HunanPresentXia et al. (2011)
-JiangsuPresentEPPO (2020); CABI and EPPO (2010)
-LiaoningPresentXu et al. (2013); EPPO (2020)
-NingxiaPresentCABI and EPPO (2010)
-ShaanxiPresentCABI and EPPO (2010)
-ShandongPresentEPPO (2020)
-YunnanPresentCABI and EPPO (2010)
Hong KongPresentEPPO (2020); CABI and EPPO (2010)
IndiaPresentEPPO (2020); CABI and EPPO (2010)
-Andhra PradeshPresentCABI and EPPO (2010)
-AssamPresentEPPO (2020); CABI and EPPO (2010)
-ChhattisgarhPresentCABI and EPPO (2010)
-KeralaPresentCABI and EPPO (2010)
-PunjabPresentEPPO (2020); CABI and EPPO (2010)
-Tamil NaduPresentCABI and EPPO (2010)
-Uttar PradeshPresentCABI and EPPO (2010)
-UttarakhandPresentCABI and EPPO (2010)
IndonesiaPresentEPPO (2020); CABI and EPPO (2010)
-JavaPresentCABI and EPPO (2010)
-SumatraPresentCABI and EPPO (2010)
IranPresentZafari and Hamadani (2009); Mousakhah and Khodaparast (2012)
IsraelPresentEPPO (2020); CABI and EPPO (2010)
JapanPresentEPPO (2020); CABI and EPPO (2010)
-HokkaidoPresentCABI and EPPO (2010)
-HonshuPresentEPPO (2020); CABI and EPPO (2010)
-KyushuPresentCABI and EPPO (2010)
-ShikokuPresentCABI and EPPO (2010)
MalaysiaPresentEPPO (2020); CABI and EPPO (2010)
-Peninsular MalaysiaPresentCABI and EPPO (2010)
-SabahPresentCABI and EPPO (2010)
NepalPresentEPPO (2020); CABI and EPPO (2010)
Saudi ArabiaPresentAmmar and El-Naggar (2011)
South KoreaPresentEPPO (2020); CABI and EPPO (2010)
Sri LankaPresentEPPO (2020); CABI and EPPO (2010)
TaiwanPresentEPPO (2020); CABI and EPPO (2010)
ThailandPresentEPPO (2020); CABI and EPPO (2010)
TurkeyPresentCABI and EPPO (2010); EPPO (2020)

Europe

AustriaPresent, Few occurrencesEPPO (2020); CABI and EPPO (2010)
BelgiumPresentEPPO (2020); CABI and EPPO (2010)
Bosnia and HerzegovinaPresentCABI and EPPO (2010)
BulgariaPresent, LocalizedEPPO (2020); CABI and EPPO (2010)
CyprusPresentCABI and EPPO (2010)
CzechiaPresent, LocalizedEPPO (2020); CABI and EPPO (2010); Víchová et al. (2013)
DenmarkPresentEPPO (2020); CABI and EPPO (2010)
EstoniaAbsent, Confirmed absent by surveyEPPO (2020)
FinlandPresent, LocalizedEPPO (2020); CABI and EPPO (2010)
FrancePresentEPPO (2020); CABI and EPPO (2010)
GermanyPresent, Few occurrencesEPPO (2020); CABI and EPPO (2010)
GreecePresentIliadi et al. (2018)
HungaryPresent, Few occurrencesEPPO (2020); Irinyi and Kövics (2008); CABI and EPPO (2010)
IrelandPresent, Few occurrencesEPPO (2020)
ItalyPresentCABI and EPPO (2010); Mari et al. (2012); Vitale and Infantino (2014); Vitale et al. (2015); Frisullo et al. (2016); EPPO (2020)
-SicilyPresentPolizzi et al. (2011)
LatviaPresentCABI and EPPO (2010)
LithuaniaPresent, Few occurrencesEPPO (2020); CABI and EPPO (2010)
MaltaPresent, LocalizedEPPO (2020); CABI and EPPO (2010)
MontenegroPresentLatinovic et al. (2012); EPPO (2020)
NetherlandsPresentNPPO of the Netherlands (2013); CABI and EPPO (2010); EPPO (2020)
NorwayPresentEPPO (2020); CABI and EPPO (2010)
PolandPresentCABI and EPPO (2010)
PortugalPresentCABI and EPPO (2010); EPPO (2020)
RussiaPresent, Few occurrencesEPPO (2020)
-Southern RussiaPresent, Few occurrencesEPPO (2020)
SerbiaPresentCABI and EPPO (2010); EPPO (2020)
SloveniaPresent, Few occurrencesEPPO (2020); CABI and EPPO (2010)
SpainPresent, LocalizedEPPO (2020); CABI and EPPO (2010)
SwedenPresent, Few occurrencesEPPO (2020); CABI and EPPO (2010)
SwitzerlandPresentCABI and EPPO (2010); Michel et al. (2011); Michel et al. (2013); EPPO (2020)
United KingdomPresent, LocalizedEPPO (2020); CABI and EPPO (2010); Baroncelli et al. (2014)
-Channel IslandsPresentEPPO (2020); CABI and EPPO (2010)
-EnglandPresent, LocalizedEPPO (2020)
-Northern IrelandPresentCABI and EPPO (2010)
-ScotlandAbsent, Intercepted onlyCABI and EPPO (2010)

North America

BelizePresentEPPO (2020); CABI and EPPO (2010)
CanadaPresent, LocalizedEPPO (2020); CABI and EPPO (2010)
-British ColumbiaPresentEPPO (2020); CABI and EPPO (2010)
-ManitobaPresentEPPO (2020); CABI and EPPO (2010)
-New BrunswickPresentEPPO (2020); CABI and EPPO (2010)
-Nova ScotiaPresentEPPO (2020); CABI and EPPO (2010)
-OntarioPresentEPPO (2020); CABI and EPPO (2010)
-QuebecPresentEPPO (2020); CABI and EPPO (2010)
Costa RicaPresentEPPO (2020); CABI and EPPO (2010)
DominicaPresentEPPO (2020); CABI and EPPO (2010)
Dominican RepublicPresentEPPO (2020); CABI and EPPO (2010)
JamaicaPresentCABI and EPPO (2010)
MexicoPresentCABI and EPPO (2010)
Saint LuciaPresentCABI and EPPO (2010)
United StatesPresentEPPO (2020); CABI and EPPO (2010)
-AlabamaPresentCABI and EPPO (2010)
-ArkansasPresentEPPO (2020); CABI and EPPO (2010)
-CaliforniaPresentEPPO (2020); CABI and EPPO (2010); Swain et al. (2012)
-ConnecticutPresentEPPO (2020); CABI and EPPO (2010)
-FloridaPresentEPPO (2020); CABI and EPPO (2010)
-GeorgiaPresentCABI and EPPO (2010)
-KentuckyPresentCABI and EPPO (2010)
-LouisianaPresentEPPO (2020); CABI and EPPO (2010)
-MarylandPresentCABI and EPPO (2010)
-MassachusettsPresentCABI and EPPO (2010)
-MichiganPresentCABI and EPPO (2010); Rodriguez-Salamanca et al. (2012)
-MississippiPresentEPPO (2020); CABI and EPPO (2010)
-MissouriPresentEPPO (2020); CABI and EPPO (2010)
-New MexicoPresentFrench et al. (2013); EPPO (2020)
-New YorkPresentEPPO (2020); CABI and EPPO (2010)
-North CarolinaPresentEPPO (2020); CABI and EPPO (2010)
-OhioPresentEPPO (2020); CABI and EPPO (2010)
-OklahomaPresentEPPO (2020); CABI and EPPO (2010)
-PennsylvaniaPresentPollok et al. (2012)
-Rhode IslandPresentCABI and EPPO (2010)
-South CarolinaPresentCABI and EPPO (2010)
-TennesseePresentCABI and EPPO (2010)
-VirginiaPresentCABI and EPPO (2010)
-WashingtonPresentCABI and EPPO (2010)

Oceania

AustraliaPresentEPPO (2020); CABI and EPPO (2010)
-New South WalesPresentEPPO (2020); CABI and EPPO (2010)
-QueenslandPresentEPPO (2020); CABI and EPPO (2010)
-South AustraliaPresentCABI and EPPO (2010)
-TasmaniaPresentCABI and EPPO (2010)
-VictoriaPresentEPPO (2020); CABI and EPPO (2010)
-Western AustraliaPresentEPPO (2020); CABI and EPPO (2010)
GuamPresentCABI and EPPO (2010)
New ZealandPresentEPPO (2020); CABI and EPPO (2010)
Papua New GuineaPresentCABI and EPPO (2010)
VanuatuPresentEPPO (2020); CABI and EPPO (2010)

South America

ArgentinaPresent, LocalizedEPPO (2020); CABI and EPPO (2010); Sir et al. (2012)
BrazilPresent, LocalizedEPPO (2020); CABI and EPPO (2010)
-GoiasPresentCABI and EPPO (2010)
-Minas GeraisPresentEPPO (2020); CABI and EPPO (2010)
-Rio Grande do SulPresentCABI and EPPO (2010)
-Santa CatarinaPresentCABI and EPPO (2010)
-Sao PauloPresentEPPO (2020); CABI and EPPO (2010)
ChileAbsent, Invalid presence record(s)CABI and EPPO (2010); EPPO (2020)
ColombiaPresentEPPO (2020); CABI and EPPO (2010)
EcuadorPresentEPPO (2020); CABI and EPPO (2010)
GuyanaPresentCABI and EPPO (2010)
UruguayPresentEPPO (2020); CABI and EPPO (2010); Alaniz et al. (2012)
VenezuelaPresentEPPO (2020); Cedeño et al. (2007); CABI and EPPO (2010)

Risk of Introduction

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C. acutatum has not been considered to be a quarantine pest by EPPO or any other regional plant protection organization. A certain ambiguity remains on its geographical distribution and impact on the strawberry crop, due to confusion with other Colletotrichum spp. In several countries of mainland Europe, the names C. fragariae or C. gloeosporioides have been used for all fungi causing anthracnose on strawberry. C. acutatum was only described on strawberry in the 1960s (Simmonds, 1966) and it is not clear whether its subsequent appearance as a strawberry pathogen in the literature is due to geographical spread of a pathogen which previously had a restricted distribution, to the rise in importance of a pathogen which was previously insignificant, or simply to the clarification of a taxonomic situation which was previously confused. As C. acutatum attacks several other crops without being a serious cause of concern, and indeed many other plant species, it does not appear logical to attempt to control it by international phytosanitary measures. In addition, identification in imported consignments presents difficulties because of the confusion with related species. Pathogen-free certification of strawberry planting material seems the best approach.

Phytosanitary Measures

The inclusion of C. acutatum (and other Colletotrichum spp.) among the species covered by a strawberry certification scheme would ensure that healthy planting material is traded nationally and internationally. A suitable scheme has been recommended by EPPO (OEPP/EPPO, 1994).

Hosts/Species Affected

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The species has a very wide host range, but is economically most important on strawberries.

C. acutatum can apparently affect almost any flowering plant, especially in warm temperate or tropical regions, although its host range needs further clarification. It has rarely been noted on other than agricultural or forestry land.
 

Host Plants and Other Plants Affected

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Plant nameFamilyContext
Acer palmatum (Japanese maple)AceraceaeUnknown
Anemone (windflower)RanunculaceaeUnknown
Anemone coronaria (Poppy anemone)RanunculaceaeUnknown
Apium graveolens (celery)ApiaceaeOther
Arachniodes adiantiformis (Leatherleaf fern)DryopteridaceaeOther
Arbutus unedo (arbutus)EricaceaeOther
Averrhoa carambola (carambola)OxalidaceaeOther
Camellia sinensis (tea)TheaceaeOther
Capsicum (peppers)SolanaceaeUnknown
Capsicum annuum (bell pepper)SolanaceaeOther
CitrusRutaceaeUnknown
Citrus aurantiifolia (lime)RutaceaeOther
Citrus reticulata (mandarin)RutaceaeUnknown
Citrus sinensis (navel orange)RutaceaeUnknown
Cornus florida (Flowering dogwood)CornaceaeUnknown
Cosmos bipinnatus (garden cosmos)AsteraceaeUnknown
Dryas drummondiiRosaceaeOther
Duchesnea indica (India mockstrawberry)RosaceaeOther
Eriobotrya japonica (loquat)RosaceaeUnknown
Eustoma grandiflorum (Lisianthus (cut flower crop))GentianaceaeUnknown
Fragaria ananassa (strawberry)RosaceaeMain
Helianthus annuus (sunflower)AsteraceaeOther
Hevea brasiliensis (rubber)EuphorbiaceaeUnknown
Lupinus (lupins)FabaceaeUnknown
Lupinus albus (white lupine)FabaceaeOther
Malus domestica (apple)RosaceaeUnknown
Mangifera indica (mango)AnacardiaceaeOther
Morus (mulberrytree)MoraceaeUnknown
Nyssa sylvatica (tupelo)CornaceaeUnknown
Olea europaea subsp. europaea (European olive)OleaceaeOther
Pelargonium (pelargoniums)GeraniaceaeOther
Persea americana (avocado)LauraceaeOther
Phaseolus vulgaris (common bean)FabaceaeOther
Phoenix dactylifera (date-palm)ArecaceaeOther
Pinus (pines)PinaceaeUnknown
Pinus radiata (radiata pine)PinaceaeUnknown
Prunus domestica (plum)RosaceaeUnknown
Prunus dulcis (almond)RosaceaeUnknown
Prunus persica (peach)RosaceaeUnknown
Prunus salicina (Japanese plum)RosaceaeMain
Psidium guajava (guava)MyrtaceaeUnknown
Punica granatum (pomegranate)PunicaceaeOther
Pyrus communis (European pear)RosaceaeOther
Ribes uva-crispa (gooseberry)GrossulariaceaeOther
Rubus brasiliensisRosaceaeOther
Salix babylonica (weeping willow)SalicaceaeOther
Sambucus nigra (elder)CaprifoliaceaeOther
Tsuga heterophylla (western hemlock)PinaceaeUnknown
Vaccinium corymbosum (blueberry)EricaceaeOther
Vitis vinifera (grapevine)VitaceaeOther

Growth Stages

Top of page Post-harvest

Symptoms

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The spread of the disease is often so rapid that by the time symptoms are noticed, the crop is in serious danger. For strawberry, fruit and occasionally petiole rots may be noticed, with sunken, water-soaked spots enlarging to cover the whole fruit within 2-3 days, with dark-brown fruit bodies producing pink spore masses. For other crops such as anemone and celery, crown rots and leaf curl may be the principal symptoms. In pine seedlings, the developing leaves around the apical bud are affected, with small, brown lesions appearing and rapidly extending. Severe stunting is eventually caused as the uninfected tissue beneath the apex continues to develop.

List of Symptoms/Signs

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SignLife StagesType
Fruit / lesions: scab or pitting
Leaves / leaves rolled or folded
Stems / rot
Stems / stunting or rosetting

Biology and Ecology

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The conidia germinate to form appressoria on plant surfaces, from which penetration hyphae develop into plant cells. Infection may occur through almost any plant surface, but for the particularly susceptible herbaceous species such as strawberry and anemone, the crown with its relatively humid microclimate is often favoured. In suitable conditions, the fungus can grow rapidly inside the plant and cause severe symptoms very quickly, but in other circumstances the fungus may be quiescent inside host tissues for a period, in some cases only becoming apparent after harvest. Once the fungus has developed sufficiently inside the plant, dark fruit-bodies are produced, causing typical anthracnose symptoms. Conidia are formed liberally, and are normally dispersed by watersplash (Yang et al., 1992). They may lie dormant in the soil for some time, often overwintering in this fashion. Survival is longest under relatively cool, dry conditions (Eastburn and Gubler, 1992). The fungus can also remain dangerous for long periods in dead plant material on the surface or buried in the soil.

Although the disease in strawberry crops tends to be more virulent in warm climates, where damage can be devastating, it frequently has its origins in cooler conditions where propagating material is grown (Opgenorth et al., 1989; Wilson et al., 1990; Sutton, 1992). The disease may possibly occur in all countries where strawberries are cultivated. However, it is reported to be absent from the premises of most major strawberry propagators in the UK, and it may be possible to exclude the fungus from these sites despite its presence elsewhere in the areas concerned. There is little information on the biology of C. acutatum other than for strawberry crops.

In some crops, notably mango (Liu et al., 1986) and tamarillo (Yearsley et al., 1988), C. acutatum causes postharvest diseases of fruits.

Means of Movement and Dispersal

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Most natural transmission is probably by conidia, although appressoria, hyphal fragments and appressorium-like thick-walled cells may also play a part (Nair et al., 1983). Local dispersal seems to be at least mostly by water-splash (Yang et al., 1990), with propagules sometimes overwintering in soil to affect strawberry crops planted in subsequent years (Eastburn and Gubler, 1990).

Long-distance transmission due to human influence is probably widespread, and has contributed to the rapid spread of the fungus in recent years. The disease is frequently intercepted on strawberry material imported into the UK.

Plant Trade

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Plant parts liable to carry the pest in trade/transportPest stagesBorne internallyBorne externallyVisibility of pest or symptoms
Bark hyphae; spores Yes Yes Pest or symptoms usually invisible
Flowers/Inflorescences/Cones/Calyx hyphae; spores Yes Yes Pest or symptoms usually visible to the naked eye
Fruits (inc. pods) hyphae; spores Yes Yes Pest or symptoms usually invisible
Leaves hyphae; spores Yes Yes Pest or symptoms usually visible to the naked eye
Roots hyphae Yes Pest or symptoms usually invisible
Stems (above ground)/Shoots/Trunks/Branches hyphae; spores Yes Yes Pest or symptoms usually visible to the naked eye
Plant parts not known to carry the pest in trade/transport
Growing medium accompanying plants
Seedlings/Micropropagated plants
Wood

Impact

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The disease is significant worldwide on strawberry (on which it is considered the second most important pathogen after Botrytis cinerea), and also on a few other crops such as anemones. The disease on pine may not now be so severe as in recent years, judging from the decline in research papers. Little detailed information on economic losses is available. In France, the disease has caused up to 80% losses of unsprayed strawberry crops, especially of ever-bearing cultivars (Denoyes and Baudry, 1991). Crops sprayed for B. cinerea control have suffered much less. In the UK, where the disease is statutorily notifiable, presence forces the burning of crops and fumigation of the soil.

Recent studies in Australia showed that C. acutatum caused losses of 25-50% in celery crops in Queensland (Wright and Heaton, 1991).

Detection and Inspection

Top of page No rapid methods exist, although early results from a detection system using monoclonal antibodies are promising. Current tests involve either inoculation of apples with strawberry petioles or paraquat treatment of petioles to stimulate sporulation of the pathogen (Cook, 1993). These tests are time-consuming and labour-intensive.

Prevention and Control

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Due to the variable regulations around (de)registration of pesticides, your national list of registered pesticides or relevant authority should be consulted to determine which products are legally allowed for use in your country when considering chemical control. Pesticides should always be used in a lawful manner, consistent with the product's label.

The only serious research on control has been in connection with strawberry crops. Some success was reported in New Zealand by spraying with dichlofluanid and a captan-benomyl mixture (Cheah and Soteros, 1984), with various chemicals in Australia (Washington et al., 1992), and in South Africa with captan (van Zyl, 1985). Recently in the USA, studies showed that no acceptable fungicide is effective (Milholland, 1989). Fungicide-resistant strains of related species have been reported in the USA and Japan (Chikuo and Kobayashi, 1991; McInnes et al., 1992). There have been considerable efforts in the USA to develop resistant strawberry cultivars, but limited success has been achieved due to the presence of varied races within the species (Delp and Milholland, 1981; Smith, 1985; Smith and Black, 1990; McInnes et al., 1992). Gupton and Smith (1991) have suggested some potentially useful directions for further research.

In the UK, the disease is rare owing to strict quarantine controls and a policy of destroying affected crops and fumigating soil. McInnes et al. (1992) found that nursery material derived from tissue culture which was free from the related species C. fragariae and planted in isolated fields remained healthy, suggesting that careful selection of disease-free stock and soil sterilization in affected beds might be at least as effective as attempting chemical control.

In celery crops, Wright and Heaton (1991) found both a variation in cultivar susceptibility and amenability to chemical control of the disease. For anemone, disease incidence decreased with storage of corms (Doornik and Booden, 1990), and treatment by soaking with hot water proved effective (Doornik, 1990). Yearsley et al. (1988) found that dipping of tamarillos in imazalil and prochloraz reduced the incidence of postharvest disease caused by C. acutatum. However, dipping strawberry plants in hot water or fungicides did not eliminate the disease.

For pine, regular applications of prochloraz have been found to be effective, as has dichlofluanid (Vanner, 1990).

References

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Alaniz S, Hernández L, Damasco D, Mondino P, 2012. First report of Colletotrichum acutatum and C. fragariae causing bitter rot of apple in Uruguay. Plant Disease, 96(3):458. http://apsjournals.apsnet.org/loi/pdis

Ammar MI, El-Naggar MA, 2011. Date palm (Phoenix dactylifera L.) fungal diseases in Najran, Saudi Arabia. International Journal of Plant Pathology, 2(3):126-135. http://scialert.net/fulltext/?doi=ijpp.2011.126.135&org=12

Baroncelli R, Sreenivasaprasad S, Lane CR, Thon MR, Sukno SA, 2014. First report of Colletotrichum acutatum sensu lato (Colletotrichum godetiae) causing anthracnose on grapevine (Vitis vinifera) in the United Kingdom. New Disease Reports, 29:26. http://www.ndrs.org.uk/article.php?id=029026

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Mari M, Guidarelli M, Martini C, Spadoni A, 2012. First report of Colletotrichum acutatum causing bitter rot on apple in Italy. Plant Disease, 96(1):144. http://apsjournals.apsnet.org/loi/pdis

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Michel VV, Hollenstein R, Stensvand A, Strømeng GM, 2013. Colletotrichum acutatum, agent of anthracnose on the new host black elderberry (Sambucus nigra) in Switzerland. Plant Disease, 97(9):1246. http://apsjournals.apsnet.org/loi/pdis

Michel VV, Stensvand A, Strømeng GM, 2011. Yellow dryad, a new host plant of Colletotrichum acutatum in Switzerland. Plant Disease, 95(8):1031. http://apsjournals.apsnet.org/loi/pdis

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Vitale S, Giambattista Gdi, Riccioni L, 2015. First report of laurel anthracnose caused by Colletotrichum acutatum in central Italy. Journal of Plant Pathology, 97(3):544. http://www.sipav.org/main/jpp/

Vitale S, Infantino A, 2014. Presence of Colletotrichum acutatum causing anthracnose on hot pepper in central Italy. Journal of Plant Pathology, 96(3):607. http://sipav.org/main/jpp/index.php/jpp/article/view/3193/1865

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Distribution References

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Ammar M I, El-Naggar M A, 2011. Date palm (Phoenix dactylifera L.) fungal diseases in Najran, Saudi Arabia. International Journal of Plant Pathology. 2 (3), 126-135. http://scialert.net/fulltext/?doi=ijpp.2011.126.135&org=12 DOI:10.3923/ijpp.2011.126.135

Baroncelli R, Sreenivasaprasad S, Lane C R, Thon M R, Sukno S A, 2014. First report of Colletotrichum acutatum sensu lato (Colletotrichum godetiae) causing anthracnose on grapevine (Vitis vinifera) in the United Kingdom. New Disease Reports. 26. http://www.ndrs.org.uk/article.php?id=029026 DOI:10.5197/j.2044-0588.2014.029.026

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Chen Y J, Tong H R, Wei X, Yuan L Y, 2016. First report of brown blight disease on Camellia sinensis caused by Colletotrichum acutatum in China. Plant Disease. 100 (1), 227-228. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-07-15-0762-PDN

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Frisullo S, Mang S M, Elshafie H S, Camele I, 2016. First report of anthracnose disease caused by Colletotrichum acutatum on Lupinus albus in Italy. Plant Disease. 100 (8), 1789. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-03-16-0268-PDN

Iliadi M K, Tjamos E C, Antoniou P P, Tsitsigiannis D I, 2018. First report of Colletotrichum acutatum causing anthracnose on olives in Greece. Plant Disease. 102 (4), 820-821. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-09-17-1451-PDN

Irinyi L, Kövics G J, 2008. The first occurrence of Colletotrichum acutatum on strawberry in Hungary. (A Colletotrichum acutatum első hazai előfordulása szamócán.). In: 13. Tiszántúli Növényvédelmi Fórum, 15-16 October 2008, Debrecen, Hungary. [ed. by Dávid I, Kövics G J]. Debrecen, Hungary: Debreceni Egyetem, Agrártudományi Centrum, Mezögazdaságtudományi Kar. 66-77.

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Mari M, Guidarelli M, Martini C, Spadoni A, 2012. First report of Colletotrichum acutatum causing bitter rot on apple in Italy. Plant Disease. 96 (1), 144. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-06-11-0483

Michel V V, Hollenstein R, Stensvand A, Strømeng G M, 2013. Colletotrichum acutatum, agent of anthracnose on the new host black elderberry (Sambucus nigra) in Switzerland. Plant Disease. 97 (9), 1246. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-08-12-0751-PDN

Michel V V, Stensvand A, Strømeng G M, 2011. Yellow dryad, a new host plant of Colletotrichum acutatum in Switzerland. Plant Disease. 95 (8), 1031. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-12-10-0876

Mousakhah M, Khodaparast S A, 2012. Morphological characterization, pathogenecity and partial rDNA sequence of Colletotrichum acutatum infecting pear in Iran. Iranian Journal of Plant Pathology. 48 (1), Pe135-Pe140, En43-En. http://www.irjpp.ir/browse.php?a_id=550&sid=1&slc_lang=en

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Polizzi G, Aiello D, Guarnaccia V, Vitale A, Perrone G, Stea G, 2011. First report of damping-off on strawberry tree caused by Colletotrichum acutatum and C. simmondsii in Italy. Plant Disease. 95 (12), 1588-1589. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-07-11-0567

Pollok J R, Mansfield M A, Gugino B K, May S R, 2012. First report of leaf curl on celery caused by Colletotrichum acutatum in the United States. Plant Disease. 96 (11), 1692. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-03-12-0271-PDN

Rodriguez-Salamanca L M, Enzenbacher T B, Byrne J M, Feng C, Correll J C, Hausbeck M K, 2012. First report of Colletotrichum acutatum sensu lato causing leaf curling and petiole anthracnose on celery (Apium graveolens) in Michigan. Plant Disease. 96 (9), 1383. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-05-12-0456-PDN

Sayeh M, Mnari-Hattab M, Zarrouk I, Dridi M, Hajlaoui M R, 2016. First report of Colletotrichum acutatum on citrus in Tunisia. (Emergence de la chute post-floraison des fruits d'agrumes (PFD) causée par Colletotichum acutatum.). Annales de l'INRAT. 122-124. http://www.annalesinrat.tn/issues/Volume89-2016.pdf DOI:10.12816/0028715

Sir E B, Arias M E, Racedo J, Castagnaro A, Díaz Ricci J C, 2012. First report of anthracnose on fruits of Duchesnea indica caused by Colletotrichum acutatum in northwestern Argentina. Plant Disease. 96 (5), 765. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-05-11-0368-PDN

Swain S V, Koike S T, Michailides T J, Feng C, Correll J C, 2012. First report of twig canker on willow caused by Colletotrichum acutatum in California. Plant Disease. 96 (12), 1822-1823. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-05-12-0496-PDN

Víchová J, Jílková B, Pokorný R, 2013. First report of Colletotrichum acutatum sensu lato causing anthracnose on gooseberry fruits in the Czech Republic. Plant Disease. 97 (9), 1249. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-01-13-0080-PDN

Vitale S, Giambattista G di, Riccioni L, 2015. First report of laurel anthracnose caused by Colletotrichum acutatum in central Italy. Journal of Plant Pathology. 97 (3), 544. http://www.sipav.org/main/jpp/

Vitale S, Infantino A, 2014. Presence of Colletotrichum acutatum causing anthracnose on hot pepper in central Italy. Journal of Plant Pathology. 96 (3), 607. http://sipav.org/main/jpp/index.php/jpp/article/view/3193/1865

Xia H, Wang X L, Zhu H J, Gao B D, 2011. First report of anthracnose caused by Glomerella acutata on chili pepper in China. Plant Disease. 95 (2), 219. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-10-10-0727

Xu C N, Zhou Z S, Wu Y X, Chi F M, Ji Z R, Zhang H J, 2013. First report of Colletotrichum acutatum associated with stem blight of blueberry plants in China. Plant Disease. 97 (3), 422. http://apsjournals.apsnet.org/loi/pdis DOI:10.1094/PDIS-08-12-0738-PDN

Zafari D, Hamadani S T, 2009. Charactrization of Colletotrichum species from legumes crop plants in Iran. Applied Entomology and Phytopathology. 77 (1), Pe37-Pe57.

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