Pratylenchus brachyurus

  

Contents

  

Rev 10/14/2008

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

      Tylenchida
       Tylenchina
        Tylenchoidea
         Pratylenchidae
          Pratylenchinae
           Pratylenchus brachyurus
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Morphology and Anatomy:

Nematode is 0.4-0.5mm long.

Lip region is generally low and flat.  Head frame sclerotized.

Tail conical and rounded to flattened at tip.

Nematode has short ventral overlap of esophagus.

Monovarial, uterus prodelphic, short post-uterine sac.

Females are slender.

Males are extremely rare.
 
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Distribution:

Widely in the tropics and sub-tropics.  Type host was pineapple in Hawaii where it was described by Godfrey in 1929..

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Economic Importance:

C-rated pests in California.

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Feeding:

    Migratory endoparasite of roots.     

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Hosts:

Wide host range, including:

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Life Cycle:

There are no males (extremely rare); females reproduce by parthenogenesis.

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Damage:

Burrows through cortex; necrosis occurs after 24 hours in tobacco, 4 days in pineapple.

Can stop growth of pineapple roots.

May result in vessel blocking in corn.

In peanuts, causes crop loss by weakening pegs so that pods drop off; lesions appear on pegs, pods, and shells.

Slows growth on young citrus in Florida, but effect diminishes with tree age (O'Bannon).

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Management:

 

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References:

CIH 89

Lordello, L.G.E. 1986  Plant-parasitic nematodes that attack coffee. Pp 33-41 in Anon.  Plant-parasitic nematodes of bananas, citrus, coffee, grapes and tobacco. Union Carbide Corp.

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Copyright © 1999 by Howard Ferris.
Revised: October 14, 2008.