Heterodera raskii		Contents		Rev 03/23/2007
		Classification		Hosts
		Morphology and Anatomy		Life Cycle
Return to Heterodera Menu		Economic Importance		Damage
		Distribution		Management
Return to Heteroderidae Menu		Feeding

Classification:

      Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Heteroderinae

           

         Heterodera raskii Basnet and Jayaprakash, 1984

 

Synonyms:

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Morphology and Anatomy:

	Female:  575-700m long, 210-290m wide. Pearly white color, protruding neck and prominent vulval cone.   Considered a member of the "goettingiana" group.
Cyst:  Light to dark brown, elongate, ovoid, ambifenestrate with weak underbridge.  No egg sac, eggs retained in cyst.
Male:  Typical of genus. J2:  500m long, rounded stylet knobs.

Illustrations adapted from Basnet and Jayaprakash (1984).

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Distribution:

Reported from Hyderabad, India.

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Economic Importance:

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Feeding:

Sedentary semi-endoparasite of roots, feeding patterns typical of genus Heterodera.

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Hosts:

Described from roots of bulb grass, Cyperus bulbosus Vab. Establishes feeding sites on both roots and tubers.

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Life Cycle:

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Damage:

Slow decline and loss of vigor of host grass.

Management:

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References

Basnet, C. P. and A. Jayaprakash (1984). Heterodera raskii, new species (Heteroderidae: Tylenchina) a cyst nematode on grass from Hyderabad, India. Journal of Nematology 16: 213-216.