Crossonema

  

Contents

  

Rev: 12/18/2023

  Classification Hosts
Morphology and Anatomy Life Cycle
Return to Crossonema Menu Economic Importance Damage
Distribution Management
Return to Criconematidae Menu Feeding References
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Classification:

      Tylenchida
       Tylenchina
        Criconematoidea
         Criconematidae
          Criconematinae


           Crossonema Mehta & Raski, 1971

Type species of the genus: Crossonema civellae (Steiner, 1949) Mehta & Raski, 1972

    Synonyms:
   

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Morphology and Anatomy:

 

 Female: Ring nematodes with posterior edges of body annuli with a continuous fringe of long spines or rectangular scale-like stuctures. Head region with 2 or 3 annules set off from remainder, first annule discoid.  Head with 6 dom-shaped lips; submedian lobes usually absent.

 
Males: Bursa rudimenatry or absent.

Juveniles: With 8 longitudinal rows of cuticular scales, each with 3 to 5 points at apex.

[Ref:  Geraert (2010)]

Body size range for the species of this genus in the database - Click:
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Distribution:

 

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Economic Importance:

D-rated pest in California Nematode Pest Rating System.

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Feeding:

      Ring nematodes feed ectoparasitically on root tips or along more mature roots. The nematodes are migratory unless soil pore space limits their movement. Adult stages of the larger ring nematode adults appear sedentary or stuck within their pore space as they develop to adult size. 

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Hosts:

For an extensive host range list for this genus, click
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Life Cycle:

For Ecophysiological Parameters for this genus, click 
 

Nematodes exhibit characteristic slow, sluggish movement.

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Damage:

 

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Management:

Extraction poor except with sugar/centrifugation method.

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References:

Geraert, E. 2010. The Criconematidae of the World: Identification of the Family Criconematidae. Academia Press, Gent. 615p.

Raski, D.J. and Luc, M. 1987. A reappraisal of Tylenchina (Nematoda) 10. The superfamily Criconematoidea Taylor, 1936. Revue de Nematologie 10:409-444.

 


 
 
 
Copyright © 1999 by Howard Ferris.
Revised: December 18, 2023.