Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide


Zygotylenchus guevarai



Zygotylenchus guevarai


  • Last modified
  • 02 July 2019
  • Datasheet Type(s)
  • Pest
  • Preferred Scientific Name
  • Zygotylenchus guevarai
  • Taxonomic Tree
  • Domain: Eukaryota
  •   Kingdom: Metazoa
  •     Phylum: Nematoda
  •       Family: Pratylenchidae
  •         Genus: Zygotylenchus
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Preferred Scientific Name

  • Zygotylenchus guevarai (Tobar Jiménez, 1963) Braun & Loof, 1966

Other Scientific Names

  • Mesotylus gallicus de Guiran, 1964
  • Pratylenchoides guevarai Tobar Jiménez, 1963
  • Zygotylenchus browni Siddiqi, 1963

EPPO code

  • ZYGTGU (Zygotylenchus guevarai)

Taxonomic Tree

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  • Domain: Eukaryota
  •     Kingdom: Metazoa
  •         Phylum: Nematoda
  •             Family: Pratylenchidae
  •                 Genus: Zygotylenchus
  •                     Species: Zygotylenchus guevarai

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.

Continent/Country/RegionDistributionLast ReportedOriginFirst ReportedInvasiveReferenceNotes


IranPresentCABI/EPPO, 2008; Bajestani et al., 2016Southern Khorasan
JordanPresentCABI/EPPO, 2008
PakistanRestricted distributionMaqbool et al., 1985; CABI/EPPO, 2008
SyriaPresentCABI/EPPO, 2008
TajikistanPresentCABI/EPPO, 2008
TurkeyPresentSiddiqi, 1975; Bratus', 1976; CABI/EPPO, 2008
UzbekistanPresentBratus', 1976; CABI/EPPO, 2008


AlgeriaPresentCABI/EPPO, 2008
MoroccoPresentCABI/EPPO, 2008
South AfricaPresentAnon, 1989; Van, 1989; CABI/EPPO, 2008
TunisiaPresentSiddiqi, 1963; CABI/EPPO, 2008

North America

USAAbsent, invalid recordCABI/EPPO, 2008
-CaliforniaAbsent, invalid recordCABI/EPPO, 2008


AustriaPresentCABI/EPPO, 2008
BulgariaPresentKatalan-Gateva & Gudurova, 1979; Ryss et al., 1991; CABI/EPPO, 2008
CroatiaPresentCABI/EPPO, 2008
Czechoslovakia (former)PresentSabová and Lisková, 1974
FrancePresentDeportes et al., 1979; CABI/EPPO, 2008
GermanyWidespreadSopp, 1994; CABI/EPPO, 2008
GreecePresentHirschmann et al., 1966; CABI/EPPO, 2008
HungaryPresentDecker and Manninger, 1976; CABI/EPPO, 2008
ItalyPresentVovlas and Inserra, 1977; Mancini et al., 1980; Ambrogioni and Rapetti, 1992; CABI/EPPO, 2008
-Italy (mainland)PresentCABI/EPPO, 2008
MaltaPresentVovlas et al., 1976; CABI/EPPO, 2008
NetherlandsPresentCABI/EPPO, 2008
PolandPresentBrzeski, 1979; CABI/EPPO, 2008
SlovakiaPresentCABI/EPPO, 2008
SpainWidespreadTobar Jiménez et al., 1974; Varo Alcala et al., 1970; Tobar, 1973; CABI/EPPO, 2008
-Spain (mainland)PresentCABI/EPPO, 2008
SwitzerlandPresentCABI/EPPO, 2008
UKPresent, few occurrencesBarker and Hooper, 1995; CABI/EPPO, 2008
-England and WalesPresentCABI/EPPO, 2008
Yugoslavia (former)PresentSiddiqi, 1975


New ZealandPresentCABI/EPPO, 2008

Growth Stages

Top of page Flowering stage, Fruiting stage, Post-harvest, Pre-emergence, Seedling stage, Vegetative growing stage

List of Symptoms/Signs

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SignLife StagesType
Roots / necrotic streaks or lesions
Roots / reduced root system
Roots / soft rot of cortex
Whole plant / dwarfing

Plant Trade

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Plant parts liable to carry the pest in trade/transportPest stagesBorne internallyBorne externallyVisibility of pest or symptoms
Growing medium accompanying plants adults; eggs; juveniles Yes Pest or symptoms not visible to the naked eye but usually visible under light microscope
Roots adults; eggs; juveniles Yes Pest or symptoms not visible to the naked eye but usually visible under light microscope
Seedlings/Micropropagated plants adults; eggs; juveniles Yes Pest or symptoms not visible to the naked eye but usually visible under light microscope
Plant parts not known to carry the pest in trade/transport
Fruits (inc. pods)
Stems (above ground)/Shoots/Trunks/Branches
True seeds (inc. grain)


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Ambrogioni L, Rapetti S, 1992. Zygotylenchus guevarai (Tobar JimTnez) Braun and Loof associated with disease in Viola odorata L. cultivations. Redia, 75(2):415-427; 47 ref

Anon, 1989. New records of nematodes from. Plant Protection News, No. 18:5

Bajestani M, Moghadam E, Dolatabadi K, 2016. Two new records of plant nematode species from pomegranate gardens in southern Khorasan Province of Iran. Pakistan Journal of Nematology, 34(1):3-7

Barker ADP, Hooper DJ, 1995. The first record of the root-endoparasitic nematode Zygotylenchus guevarai in Britain. Annals of Applied Biology, 126(3):571-574; 10 ref

Berg Evan den, 1989. A new and a known nematode from the little Karoo, South Africa (Tylenchoidea: Nemata). Phytophylactica, 21(1):21-27; 6 ref

Bratus' EI, 1976. The nematode fauna of onion and its rhizosphere in the Tashkent area. VIII Vsesoyuznoe soveshchanie no nematodnym boleznyam sel'skokhozyaistvennykh kul'tur. Tezisy dokladov i soobshchenii. Kishinev, USSR: Izdatel'stvo "Shtiintsa", 127-128

Braun AL, Loof PAA, 1966. Pratylenchoides laticauda n. sp., a new endoparasitic phytonematode. Netherlands Journal of Plant Pathology, 72:241-245

Brzeski MW, 1979. Contribution to the knowledge of Polish plant-parasitic nematodes (Nematoda). 3. Some rare species of the families Anguinidae, Pratylenchidae and Trichodoridae. Fragmenta Faunistica, 25(8):110-113

CABI/EPPO, 2008. Zygotylenchus guevarai. [Distribution map]. Distribution Maps of Plant Diseases, April (Edition 1). Wallingford, UK: CABI, Map 1030

de Guiran G, 1964. Mesotylus, nouveau genre de Pratylenchinae (Nematoda: Tylenchoidea). Nematologica, 9(4):567-575

de Guiran G, Siddiqi MR, 1967. Characters differentiating the genera Zygotylenchus Siddiqi, 1963 (syn. Mesotylus de Guiran, 1964) and Pratylenchoides Winslow, 1958 (Nematoda: Pratylenchinae). Nematologica, 13:235-240

Decker H, Manninger GA, 1976. On the occurrence of Zygotylenchus guevarai in the Hungarian Republic. 2 Vortragstagung zu Aktuellen Problemen der Phytonematologie am 27.5.1976 in Rostock. Manuskriptdruck der Vortrage. Rostock, Germany: Biologische Gesellschaft der Deutschen Demokratischen Republik, Sektion Phytopathologie und Wilhelm-Pieck-Universitat, 117-125

Deportes L, Gilly G, Cuany A, Mercier S, Poupet A, Marais A, 1979. A contribution to the study of certain technical problems posed by violet culture. Pepinieristes Horticulteurs Maraichers, 200:13-21

Hirschmann H, Paschalaki-Kourtzi H, Triantaphyllou AC, 1966. A survey of plant-parasitic nematodes in Greece. Annals of Institute of Phytopathology, Benaki, 7(3):144-156

Katalan-Gateva SD, Gudurova LB, 1979. The endoparasitic species Zygotylenchus guevarai (Tobar Jiménez, 1963) Braun & Loof, 1966, (Nematoda, Tylenchida) found in Bulgaria. Acta Zoologica Bulgarica, 12:44-49

Mancini G, Moretti F, Cotroneo A, Quaglino A, Botta G, 1980. Observations on vertical distribution of plant parasitic nematodes in Piedmont vineyards. Atti Giornate Nematologiche 1980, Ascoli Piceno, Italy, 23-24 Ottobre 1980. Italy: Societa' Italiana di Nematologia, 67-74

Maqbool MA, Ghazala P, Qasim M, 1985. Zygotylenchus guevarai (Tobar Jiménez, 1963) Braun and Loof, 1966 - a new record from Pakistan. Pakistan Journal of Nematology, 3(1):15-16

Marull J, Pinochet J, Verdejo S, 1990. Response of five almond cultivars to four root-lesion nematodes in Spain. Nematropica, 20(2):143-151; 21 ref

Pinochet J, Cisneros T, 1986. Seasonal fluctuations of nematode populations in three Spanish vineyards. Revue de Nematologie, 9(4):391-398

Ryss A, Baicheva O, Stoyanov D, 1991. A new phytonematode for Bulgaria Pratylenchus pinguicaudatus Corbett, 1969 and morphological description of Pratylenchus thornei Sher et Allen, 1953 and Zygotylenchus guevarai Tobar Jimenez, 1963. Khelmintologiya, No. 30:3-8; 11 ref

Sabová M, Lisková M, 1974. Occurrence of the plant parasitic nematode Zygotylenchus guevarai (Tobar Jiménez, 1963) Braun et Loof, 1966 in Czechoslovakia. Biologia, Bratislava, B Zoológia 1, 29(2):107-110

Siddiqi MR, 1963. On the classification of the Pratylenchidae (Thorne, 1949) nov. grad. (Nematoda: Tylenchida), with a description of Zygotylenchus browni nov. gen. et nov. sp. Zeitschrift für Parasitenkunde, 23:390-396

Siddiqi MR, 1975. Zygotylenchus guevarai. CIH Descriptions of Plant-parasitic Nematodes, Set 5(No. 65) Wallingford, UK: CAB International, 3 pp

Siddiqui, I. A., Sher, S. A., French, A. M., 1973. Distribution of Plant Parasitic Nematodes in California. Sacramento, USA: State of California Department of Food and Agriculture, Division of Plant Industry.324 pp.

Sopp E, 1994. Studies on the resistance of grapevine rootstocks to virus-transmitting nematodes with particular regard to the nematode biocoenosis in vineyard soils. Untersuchungen zur Resistenz von Unterlagsreben gegenuber virusubertragenden Nematoden unter besonderer Berucksichtigung der Nematodenzonose in Weinbergsboden Geisenheim am Rhein, Germany. Forschungsanstalt Geisenheim, 17:95 pp

Tarjan AC, Weischer B, 1965. Observations on some Pratylenchinae (Nemata), with additional data on Pratylenchoides guevarai Tobar Jiménez, 1963 (syn. Zygotylenchus browni Siddiqi, 1963 and Mesotylus gallicus de Guiran, 1964). Nematologica, 11:432-440

Tobar Jiménez A, 1963. Pratylenchoides guevarai n.sp., nuevo nematode Tylénchido, relacionado con el ciprés (Cupressus sempervirens L.). Revta Ibéria Parasitologia, 23:27-36

Tobar Jiménez A, 1973. Nematodes of the unirrigated areas of Alhama. I. Population levels and host crops. Revista Ibérica de Parasitologia, 33(4):525-556

Tobar Jiménez A, Guevara Benitez D, Martinez Sierra C, 1968. Influencia de Zygotylenchus guevarai (Tobar Jiménez, 1963) Braun y Loof, 1966 sobre algunos de sus hospedadores. Revista Ibérica de Parasitologia, 28(2):177-187

Tobar Jiménez A, Martinez Sierra C, 1966. El Pratylenchoides guevarai Tobar Jiménez, 1963, parásito grave de la violeta (Viola odorata L.) grandina. Revista Ibérica de Parasitologia, 26(2/3):233-238

Tobar-Jimenez A, Gallardo-Bernal M, Palacios-Mejia F, 1974. Some hosts of various nematodes of the order Tylenchida. Revista Iberica de Parasitologia, 34(3/4):237-244

Varo Alcala J, Tobar Jiménez A, 1970. Lesions and reactions caused by soil nematodes on the roots of plants. Xth International Nematology Symposium, 8-13 September, 1970. Pescara, Italy: European Society of Nematologists

Varo Alcala J, Tobar Jiménez A, Mu±oz Medina JM, 1970. Lesiones causada y reacciones provocadas por algunos, nematodes en las raices de ciertas plantas. Revista Ibérica de Parasitologia, 30(4):547-566

Verdejo S, Pinochet J, 1991. Reproduction of the nematode Zygotylenchus guevarai (Nemata: Pratylenchidae) in monoxenic cultures. Revue de Ne^acute~matologie, 14(2):291-297; 12 ref

Verdejo-Lucas S, Pinochet J, 1992. Population densities of five migratory endoparasitic nematodes in carrot disk cultures. Journal of Nematology, 24(1):96-98; 14 ref

Vovlas N, 1977. Observation on the embryonic development of Zygotylenchus guevarai. Nematologia Mediterranea, 5(1):121-124

Vovlas N, Inserra RN, 1977. Histological alterations induced by Pratylenchus thornei and Zygotylenchus guevarai in the roots of bean. Italia Agricola, 9:122-125

Vovlas N, Inserra RN, Lamberti F, 1976. Observations on the epidemiology and pathogenicity of Zygotylenchus guevarai. Nematologia Mediterranea, 4(2):183-193

Distribution Maps

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