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Ditylenchus destructor (Thorne)
Heterodera destructor

Nematoda, Tylenchida, Tylenchidae .

Potato tuber nematode

Description, Biology, Life Cycle, Damage, Common Names, Images


[R]Description
- All male and female stages are vermiform and adults are 0.9-1.8 mm long.

[R]Biology
- Host plants: potato, hop, dandelion (Taraxacum), iris (Iris spp.), begonia (Begonia spp.).
- This species attacks tubers and rhizomes, stem-like underground parts, causing the formation of necroses. Nematodes are present between healthy and necrotic tissue and all stages from egg to adult may be found.
Since it has little resistance to dryness, this species occurs exclusively in wet land.

[R]Damage
- At harvest, tubers exhibit small discoloured spots. In heavy attacks, the epidermis becomes greyish-black, abnormally thin, dry and cracked (*) . Underlying tissues are spongy and brownish, forming lumpy masses.
Decomposing tissues are colonized by saprophagous nematodes. Tubers in store dry out and harden.


[R]Common Names
DE: Älchenkrätze der Kartoffel, Wurmfäule der Kartoffel ES: Anguilulosis de la patata FR: Nématode de la pomme de terre IT: Nematode della fragola PT: Nemátodo da batateira GB: Potato tuber nematode

[R] Images

  1. Ditylenchus destructor (Thorne) (INRA Antibes)
    Damage to carrot
  2. Ditylenchus destructor (Thorne) Damage to Arachis hypogea (in Journal of Nematology)
  3. Ditylenchus destructor (Thorne) Damage to bulbs of Iris hollandicum (INRA Le Rheu)

To read this page in French

HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.

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