Meloidogyne partityla




Rev 09/05/2022

Pecan Root-Knot Nematode Classification Hosts
Morphology and Anatomy Life Cycle
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Distribution Management
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        Meloidogyne partityla Kleynhans, 1986

Pecan Root-Knot Nematode

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Morphology and Anatomy:





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

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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 site establishment and development typical of genus. 

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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


Sedentary endoparasites.

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

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

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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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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.

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.

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Copyright 1999 by Howard Ferris.
Revised: September 05, 2022.