Helicotylenchus pseudorobustus

**Helicotylenchus pseudorobustus**	Contents	Rev 08/03/20
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Helicotylenchus Menu	Economic Importance	Damage
	Distribution	Management
Return to Hoplolaimidae Menu	Feeding
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Classification:

        Tylenchina
        Tylenchoidea
         Hoplolaimidae
          Hoplolaiminae

Helicotylenchus pseudorobustus (Steiner, 1914) Golden, 1956

Morphology and Anatomy:

Female:

Typical spiral body morphology when heat-killed.

Head frame rounded to conical, strong stylet.

Short ventral overlap of esophagus over intestine.

Diovarial, amphidelphic.

Tail tip with a finger-like projection.

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Feeding:

Although this spiral nematode is usually an ectoparasite, it may penetrate half a body length into roots of woody perennials.

Hosts:

For an extensive host range list for this species, click

Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters

It has been shown to damage 'Thompson Seedless' grapevines under greenhouse conditions (Pinochet et al., 1976). Such damage may occur in newly replanted vineyards on silty soils or those with a history of grasses.

Long-term damage effects by this nematode are not documented, but if high field population levels can be extracted from a soil-less root sample, this nematode should be further investigated as the source of the problem.