Pratylenchus brachyurus

 

Contents

 

Rev 11/19/2019

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

 


Classification:

         Tylenchina
        Tylenchoidea
         Pratylenchidae
          Pratylenchinae


           Pratylenchus brachyurus (Godfrey, 1929) Filipjev & Schuurmans-Stekhoven, 1941

Back to Top

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.

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

 
Back to Top

Distribution:

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

In surveys of the state of Mato Grosso in Brazil, 94% of cotton fields and 85% of soybean fields were infested with P. brachyurus (Da Silva et al., 2004; Miranda et al., 2010).

Back to Top

Economic Importance:

C-rated pest in California Nematode Pest Rating System.

Back to Top

Feeding:

    Migratory endoparasite of roots.     

The nematode is readily cultured on carrot disks on 1% agar for detailed study of life cycle and other biological aspects (Moody et al., 1973).

Back to Top

Hosts:

Wide host range, including:

For an extensive host range list for this species, click


Back to Top

Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters

 

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

Back to Top

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).

Patchers of stunted plants in soybean fields in Brazil

 

Back to Top

Management:

Crop Rotation:

The wide diistribution and host range of this nematode are problematic.  The cotton fields of Mato Grosso state in Brazil with 94% infestation of P. brachyurus are rotated to soybean and corn, both hosts of the nematode (Da Siva et al., 2004).

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click

Biological Control

Attempts at soybean seed treatment with endospores of Pasteuria thornei only reduced nematode abundance when applied at very hig densities and was less effective than abamectin (Confort and Inomoto, 2018)

Back to Top

References:

CIH 89

Confort, P.M. de S. and M. M. Inomoto. 2018. Pasteuria thornei, a novel biological seed treatment for Pratylenchus brachyurus control in soybean. Nematology 20:519-523.

Da Silva. R.A., M.A.S. Serrano, A.C. Gomes, D.C. Borges, A.A. de Souza, G.L. Asmus, M.M. Inomoto. 200f. Ocorr�ncia de Pratylenchus brachyurus e Meloidogyne incognita na Cultura do Algodoeiro no Estado do Mato Grosso. Fitopatol. Bras. 29:337.

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.

MirandaM.D.FavoretoL.RibeiroN.R.(2010). Nematoides: um desafio constante. Funda��o MT Brazil Boletim de Pesquisa Soja 2011 pp. 400-414.

Moody, E.H., Lownsbery, D.F., Ahmed, J.M. 1973. Culture of the root-lesion nematode Pratylenchus vulnus on carrot disks. J. Nematology 5:225-226.

 

Back to Top

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