Helicotylenchus digonicus

  

Contents

  

Rev 11/21/19
  Classification Hosts
Morphology and Anatomy Life Cycle
Return to Helicotylenchus Menu Economic Importance Damage
Distribution Management
Return to Hoplolaimidae Menu Feeding  References
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Classification:

       Tylenchina
        Tylenchoidea  
         Hoplolaimidae
          Hoplolaiminae \

           Helicotylenchus digonicus Perry, 1959

    Synonyms:
  
   Helicotylenchus broadbalkiensis Yuen, 1964

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Morphology and Anatomy:

 
  • Female:
    Length: 0.58-0.79 mm
  • Body spiral, more so posteriorly; striae distinct.
  • Lip region high, truncate, not offset, with 4 or 5 annules.
  • Stylet 21-28 um long, knobs slightly flattened
  • Esophageal glands partially surrounding anterior end of intestine; subventrals slightly longer than the dorsal.
  • Ovaries paired, outstretched, with oocytes mostly in single file.
  • Tail dorsally convex-conoid to a narrow terminus which may form a slight projection.
Males: Quite rare.

[Ref: Andrassy, 2007

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

Reported from locations in many parts of the world.

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Economic Importance:

D-rated pests in California.

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Feeding:

Ecto- and semi-endoparasites; have large population densities.

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Hosts:

 

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

 

Nematode reproduces by parthenogenesis; there is no indication of sperm in the spermatheca and males are very rare.

 
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Damage:

 

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Management:

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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References:

 Andrassy, I. 2007. Free-living Nematodes of Hungary. III. Hungarian Natural History Museum. 497p.

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Copyright  1999 by Howard Ferris.
Revised: November 21, 2019.