Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Datasheet

Achlysiella williamsi

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Datasheet

Achlysiella williamsi

Summary

  • Last modified
  • 26 March 2018
  • Datasheet Type(s)
  • Pest
  • Preferred Scientific Name
  • Achlysiella williamsi
  • Taxonomic Tree
  • Domain: Eukaryota
  •   Kingdom: Metazoa
  •     Phylum: Nematoda
  •       Family: Pratylenchidae
  •         Genus: Achlysiella

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Pictures

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PictureTitleCaptionCopyright
Swollen female.
TitleFemale nematode
CaptionSwollen female.
Copyright©J. Bridge, D.J. Hunt & J.E. Machon/CABI BioScience
Swollen female.
Female nematodeSwollen female.©J. Bridge, D.J. Hunt & J.E. Machon/CABI BioScience
Swollen female in cavity of sugarcane root.
TitleFemale nematode in root
CaptionSwollen female in cavity of sugarcane root.
Copyright©J.E. Machon & J. Bridge/CABI BioScience
Swollen female in cavity of sugarcane root.
Female nematode in rootSwollen female in cavity of sugarcane root.©J.E. Machon & J. Bridge/CABI BioScience
Ruptured egg sac attached to sugarcane root from Papua New Guinea.
TitleRuptured egg sac
CaptionRuptured egg sac attached to sugarcane root from Papua New Guinea.
Copyright©J. Bridge & D.J. Hunt/CABI BioScience
Ruptured egg sac attached to sugarcane root from Papua New Guinea.
Ruptured egg sacRuptured egg sac attached to sugarcane root from Papua New Guinea.©J. Bridge & D.J. Hunt/CABI BioScience
Vermiform immature female: 1. Oesophagus; 2. Genital tracts; 3. Tail.  
Male: 4 & 5 Tails; 6. Oesophagus; 7. Entire male. Mature swollen female: 8, 9 & 12. Entire females; 10.  Head region; 11. Head, en face view.
TitleNematode stages
CaptionVermiform immature female: 1. Oesophagus; 2. Genital tracts; 3. Tail. Male: 4 & 5 Tails; 6. Oesophagus; 7. Entire male. Mature swollen female: 8, 9 & 12. Entire females; 10. Head region; 11. Head, en face view.
CopyrightJ.E. Machon/CABI BioScience
Vermiform immature female: 1. Oesophagus; 2. Genital tracts; 3. Tail.  
Male: 4 & 5 Tails; 6. Oesophagus; 7. Entire male. Mature swollen female: 8, 9 & 12. Entire females; 10.  Head region; 11. Head, en face view.
Nematode stagesVermiform immature female: 1. Oesophagus; 2. Genital tracts; 3. Tail. Male: 4 & 5 Tails; 6. Oesophagus; 7. Entire male. Mature swollen female: 8, 9 & 12. Entire females; 10. Head region; 11. Head, en face view.J.E. Machon/CABI BioScience

Identity

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Preferred Scientific Name

  • Achlysiella williamsi (Siddiqi, 1961) Hunt, Bridge & Machon, 1989

Other Scientific Names

  • Radopholus similis apud. Williams, 1959
  • Radopholus williamsi Siddiqi, 1961

Taxonomic Tree

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  • Domain: Eukaryota
  •     Kingdom: Metazoa
  •         Phylum: Nematoda
  •             Family: Pratylenchidae
  •                 Genus: Achlysiella
  •                     Species: Achlysiella williamsi

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

Africa

MauritiusPresentWilliams, 1960; CABI/EPPO, 2005

Oceania

AustraliaRestricted distributionCABI/EPPO, 2005
-QueenslandRestricted distributionChandler, 1978; CABI/EPPO, 2005
FijiWidespreadOrton Williams, 1980; CABI/EPPO, 2005
Papua New GuineaPresentCABI/EPPO, 2005
SamoaWidespreadOrton Williams, 1980; CABI/EPPO, 2005
TongaWidespreadOrton Williams, 1980; CABI/EPPO, 2005
TuvaluPresentCABI/EPPO, 2005
VanuatuPresentCABI/EPPO, 2005

Growth Stages

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List of Symptoms/Signs

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SignLife StagesType
Roots / cortex with lesions
Roots / necrotic streaks or lesions

Pathway Vectors

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VectorNotesLong DistanceLocalReferences
Clothing, footwear and possessionsCarrying sugarcanes Yes
Containers and packaging - woodCarrying sugarcanes Yes
Soil, sand and gravel Yes
Plants or parts of plants Yes

Plant Trade

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Plant parts liable to carry the pest in trade/transportPest stagesBorne internallyBorne externallyVisibility of pest or symptoms
Bark adults; eggs; juveniles Yes Pest or symptoms not visible to the naked eye but usually visible under light microscope
Bulbs/Tubers/Corms/Rhizomes adults; eggs; juveniles Yes Pest or symptoms not visible to the naked eye but usually visible under light microscope
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
Flowers/Inflorescences/Cones/Calyx
Fruits (inc. pods)
Leaves
Stems (above ground)/Shoots/Trunks/Branches
True seeds (inc. grain)
Wood

References

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Bridge J, Page SLJ, Jordan SM, 1982. An improved method for staining nematodes in roots. Rothamsted Report for 1981, Part 1. Harpenden, UK: Rothamsted Experimental Station.

CABI/EPPO, 2005. Achlysiella williamsi. Distribution Maps of Plant Diseases, No. 941. Wallingford, UK: CAB International.

Hooper DJ, 1990. Extraction and processing of plant and soil nematodes. In: Luc M, Sikora RA, Bridge J, eds. Plant Parasitic Nematodes in Subtropical and Tropical Agriculture. Wallingford, UK: CAB International, 45-68.

Hunt DJ, Bridge J, Machon JE, 1989. On Achlysiella, a new genus of obese Pratylenchidae (Nematoda: Tylenchoidea). Revue de Ne^acute~matologie, 12(4):401-407; 13 ref.

Orton Williams KJ, 1980. Plant parasitic nematodes of the Pacific. Technic. Rep. Vol. 8, UNDP/FAO - SPEC Survey of Agricultural Pests and Diseases in the South Pacific, Wallingford, UK: CAB International.

Siddiqi MR, 1964. Radopholus williamsi n.sp. (Nematoda: Pratylenchidae) a parasite of sugar-cane roots at L'Étoile, Mauritius. Indian Journal of Entomology, 26:207-208.

Williams JR, 1960. Studies on the nematode soil fauna of sugar cane fields in Mauritius. 4. Tylenchoidea (partim). Occasional Papers, Mauritius Sugar Industry Research Institute, 4:1-30.

Distribution Maps

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