Pratylenchus ventroprojectus




Rev 06/01/2021

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           Pratylenchus ventroprojectus Bernard, 1984.


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Morphology and Anatomy:

An amphimictic species of Pratylenchus.



  • Lip region low, conoid, flattened, with three annules.
  • Stylet stout, knobs usually large and cupped, but sometimes rounded or sloping posteriorly.
  •  Median bulb broadly oval, tbe valve large.
  • Esophageal glands well overlapping intestine;
  • Gonad outstretched; spermatheca oval to rectangular or rarely elongated, usually filled with sperm.
  • Postuterine sac 1.1 times as long as the vulval body diameter.
  • Tail short, broadly conoid, the terminus truncate, coarsely or not annulated, with a distinct, subventral projection one or two annules long.
  •  Phasmid centered in the lateral field near the middle of the tail.
  • Lateral field composed of four incisures, inner incisures meeting near the anus or on the tail; lateral field open near tail tip. 

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


  • Similar to female in most morphometric characteristics.
  • Gonad outstretched or reflexed.
  • Spicules slender, curved, partially cephalated; velum long, narrow, inconspicuous.
  • Gubernaculum curved, linear.
  • Caudal alae crenate, arising anterior to spicules and extending to tail tip.
  • Phasmids near the center of the tail.
  • Lateral field usually not extending past the cloacal opening

Ref: Bernard, 1984.

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Pratylenchus ventroprojectus is reported from Adak Iskland in the Aleutian chain of islands, Alaska.

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Economic Importance:

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    Migratory endoparasite.    

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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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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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Bernard, E.C. 1984. Hoplolaimoidea (Nematoda: Tylenchida) from the Aleutian Islands with Descriptions of Four New Species. J. Nematology 16:194-203.


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Copyright 1999 by Howard Ferris.
Revised: June 01, 2021.