Cactodera weissi   

  

Contents

  

Rev 11/19/2019

  Classification Hosts
Morphology and Anatomy Life Cycle

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 Economic Importance Damage
Distribution Management

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 Feeding  References
   

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Classification:

    Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Punctoderinae


           Cactodera weissi (Steiner, 1949) Krall & Krall, 1978

    Synonyms:
      None.

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Morphology and Anatomy:

.

 Female: Cyst stage present.  

Cyst of Cactodera weissi

Body globose, with short neck and terminal cone.  

Cuticle thick, with superficial irregular transverse ridges interrupted by short markings, more or less longitudinal; D-layer present (absent in C. betulae).

Vulva terminal surrounded by a circumfenestration; vulval slit less than 20 µm long; no underbridge; no bullae; anus without fenestration.  

All eggs retained in body (no egg-mass).  Eggs without punctations or tubercles.
Male: Body twisted.  

Stylet less than 30 µm long.

Lateral field with four lines.

Spicules greater than 30 µm long, slightly curved, pointed at distal extremity, obliquely directed.  

No cloacal tubus.  

Tail short, hemispherical. 

Second-stage juveniles: Stylet less than 30 µm long. 

Lateral field with four lines. 

Esophageal glands filling body cavity.  

Tail conical, pointed with hyaline terminal half.  

Phasmids punctiform.  

Luc, Maggenti & Fortuner (1988).

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

 

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Economic Importance:

 

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Feeding:

Nurse cell system: A syncytium.

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Hosts:

 

Knotweed (Polygonum pennsylvanicum and P. persicaria)

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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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:

Baldwin, J.G., Mundo-Ocampo, M., McClure, M. 1997. Cactodera salina n.sp. From the estuary plant, Salicornia bigelovii, in Sonora, Mexico. J. Nematology 29:465-473.

Evans, K., Rowe, J.A. 1998. Distribution and economic importance. In S.B. Sharma (ed). The Cyst Nematodes. Kluwer

Luc, Maggenti & Fortuner, Rev. Nematol. 11(2):159-176 (1988).

 

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Copyright © 1999 by Howard Ferris.
Revised: November 19, 2019.