Meloidogyne partityla

  

Contents

  

Rev 10/24/2023

Pecan Root-Knot Nematode Classification Hosts
Morphology and Anatomy Life Cycle
Return to Meloidogyne Menu Economic Importance Damage
Distribution Management
Return to Heteroderidae Menu Feeding  References
    Go to Nemaplex Main Menu   Go to Dictionary of Terminology

Classification:

      Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Meloidogyninae

        Meloidogyne partityla Kleynhans, 1986

Pecan Root-Knot Nematode

Review general characteristics of the genus Meloidogyne.

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Morphology and Anatomy:

 

Female:

Male:

 

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

Reported only from South Africa and USA.  In USA it is reported from Texas, New Mexico, Arizona, Oklahoma and Florida, primarily on roots of pecan trees.

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Economic Importance:

Pecan tree seedlings are stressed and grow poorly.  Seedlings have dead shoots in canopy.  Yield decline reported for mature trees in New Mexico.

 

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Feeding:

Sedentary endoparasite.

Feeding site establishment and development typical of genus. 

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Hosts:

Type Host: mpecan (Crya illinoensis)

Known hosts are pecan, Carya illinoensis, hickory and walnut trees (Starr et al., 2006)..

Reported non-hosts include beans, peas, cowpea, tomato, peach and weeping lovegrass (Marais and Heyns, 1990).

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

Chromosome number 2n=40-42. The large number, and variability of chromosome number, are typical of species reproducing by obligate mitotic parthenogenesis. (Marais and Kruger, 1991; Triantaphyllou, 1985; Subbotin et al., 2021).

Sedentary endoparasites.

Female body  ruptures root cortex and may  protrude with the egg mass on the root surface.   

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Damage:

Both major roots and young roots have prominent galling.  Seedlings stressed with dead shoots (Brito et al., 2006)..

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Management:

A two-year host free rotation is suggested for tree nurseries (Brito et al. 2006)..

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:

Brito, J.A., R. Kaur, D.W. Dickson, J.R. Rich and L.A. Halsey. 2006. The pecan root-knot nematode, Meloidogyne partityla Kleynhans, 1986. Nematology Circular 222. Florida Dept Ag. and Cons. Serv.

Marais, M. and J. Heyns. 1990. Host plant tests with Meloidogyne partityla Kleynhans, 1986. Phytophylactica 22:161-162.

Marais, M. and Kruger, J..C.de W. 1991. The cytogenetics of some South African root-knot nematodes (Heteroderidae: Nematoda). Phytophylactica 23:265-272.

Starr, J.L., E.K. Tomaszewski, M. Mundo-Ocampo and J.G. Baldwin, 1995.  Meloidogyne partityla on pecan: isozyme phenotypes and other hosts.  J. Nematology 28:565-568.

Subbotin, S.A. Palomares-Rius, J.E., Castillo, P. 2021. Systematics of Root-knot Nematodes (Nematoda: Meloidogynidae). Nematology Monographs and Perspectives Vol 14: D.J. Hunt and R.N. Perry (eds) Brill, Leiden, The Netherlands 857p.

Triantaphyllou, A.C. 1985. Gametogenesis and the chromosomes  of Meloidogune nataliei: not typical of other root-knot nematodes. J. Nematology 17:1-5.

Triantaphyllou, A.C. 1985. Cytogenetics, cytotaxonomy and phylogeny of root-knot nematodes. In Sasser, J.N. & Carter, C.C. (eds) An Advanced Treatiswe on Meloidogyne.Vol 1. Biology and Control.N.C. State Universty Graphics, Raleigh, N.C. USA.

 

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Copyright 1999 by Howard Ferris.
Revised: October 24, 2023.