Meloidogyne daklakensis




Rev 10/24/2023

Dak Lak Coffee Root-knot Nematode Classification Hosts
Morphology and Anatomy Life Cycle
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        Meloidogyne daklakensis  Trin, Le, Nguyen, Nguyen, Liebanas, Nguyen, 2019

Review general characteristics of the genus Meloidogyne.

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Morphology and Anatomy:



  • Body vermiform, anterior end tapering and posterior region bluntly rounded.

  • Lip region slightly offset from body, with a high lip region cap consisting of a large labial annulus. Medial lips and labial disc are bow-tie shaped. Lateral lips large and triangular, slightly lower than labial disc and medial lips.

  • Amphidial openings appear as long, wide slits located between labial disc and lateral lips.

  • Post-labial annulus divided into four lobes by longitudinal slits.

  • Stylet robust and straight, one lateral knob projected, two others sloping posteriorly.

  • Distance from base of stylet to DEGO 5±1 um.

  • Procorpus distinctly outlined, three times longer than metacorpus. Metacorpus ovoid, with a strong valve apparatus.

  • Excretory duct curved.

  • Lateral field with four incisures forming three bands, areolation along whole body.

  • One testis, occupying 58% of the body cavity.

  • Spicules slightly curved ventrally, with bluntly rounded terminus. Gubernaculum short and crescent-shaped

(Ref: Trin et al., 2019)

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


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Described from Robusta coffee in the Western Highlands of Vietnam


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Economic Importance:

Coffee roots display symptoms that are atypical of those caused by other root-knot nematodes. There is a large number of egg masses protruding outside the roots, and numerous small, white galls on adventitious roots (Trin et al., 2019).


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Sedentary endoparasite.

Feeding site establishment and development typical of genus. 

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Type host: Coffea canephora.(Robusta coffee)

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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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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Subbotin, S.A., Palomares-Rius, J.E., Castillo, P. 2021. Systematics of Root-knot Nematodes (Nematoda: Meloidogynidae). Nemaology Monographs and Perspectives Vol 14. Brill, Leiden. 857p.

Trin, Q.P., Le, T.M.L., Nguyen, T.D., Nguyen, H.T., Liebanas, G., Nguyen, T.A.D. 2019. Meloidogyne daklakensis n. sp. (Nematoda: Meloidogynidae), a new root-knot nematode associated with Robusta coffee (Coffea canephora Pierre ex A. Froehner) in the Western Highlands, Vietnam. J. Helminthology 93:242-254

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