Trichodorus similis




Rev 09/07/2021

  Classification Hosts
Morphology and Anatomy Life Cycle
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Distribution Management
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             Trichodorus similis (Seinhorst, 1963) Hunt, 1993

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Morphology and Anatomy:

Females: Diovarial.

Males: Caudal alae absent. Single testis.

Nematode is 0.76-0.87 mm long.

Body configuration usually rounded at both ends.

Cuticle tends to swell in water and fixative when nematodes are killed.

Curved onchiostyle with dorsal groove.



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

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Temperate regions of Europe.

Nematode prefers light, sandy loam.

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Economic Importance:

D-rated pests in California.

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Ectoparasite on epidermal cells and root hairs; aggregates just behind root tip.

Feeding tube forms within stoma and remains attached to puncture hole.

Feeds in cells at the root tip by repeated thrusting of the odontostyle within a polysaccharide feeding tube.  Cell contents move along the groove on the dorsal side of the odontostyle.


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Potato, walnut, apple, pear, barley, and carrots.

For an extensive host range list for this species, click

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Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters
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Feeding causes root growth to stop. Lateral roots attacked, giving rise to "stubby-root" symptom. Nematode also vectors Tobacco Rattle Virus.

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Control of Docking Disorder achieved with 1,3-Dichloropropene (1,3-D) (65-136 liters/hectare, 6-12 gpa).

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click


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Decraemer W. 1995. The Family Trichodoridae: Stubby Root and Virus Vector Nematodes. Developments in Plant Pathology, 6. Dordrecht: Kluwer Academic Publishers

Decraemer, W. 2011. Virus vector families Part II. Trichdoridae.Academia Press, Gent.123p.

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Copyright © 1999 by Howard Ferris.
Revised: September 07, 2021.