Meloidogyne moensi

Meloidogyne moensi	Contents	Rev 10/24/2023
Moens's Coffee 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 moensi Le, Nguyen, Nguyen, Liebanas, Nguyen, Trinh, 2019

Review general characteristics of the genus Meloidogyne.

Morphology and Anatomy:

Female:

Body swollen with a small posterior protuberance, elongated from ovoid to saccate.
Neck prominent, bent at various angles to body.
Lip region slightly set off from body contour; stoma slit-like, located in prominent ovoid pre-stomatal cavity, surrounded by pit-like openings of six inner labial sensilla; labial disc round, slightly raised above medial lips.
Llabial cap and medial lips slightly raised above lateral lips; medial lips dumbbell-shaped, lateral lips large, fused laterally with lip region.
Amphidial apertures oval shaped, located between labial disc and lateral lips.
Cephalic framework strong, hexaradiate.
Stylet short; cone base triangular and wider than shaft; stylet tip normally straight, sometimes slightly curved dorsally; stylet knobs oval and sloping posteriorly.\
Secretory-excretory pore located at level of procorpus, posterior to stylet knobs.
Metacorpus rounded or oval, with oval-shaped valve; pharyngeal glands with one large dorsal lobe, variable in shape, position and size.
Perineal pattern round to oval with continuous, smooth, distinct striae; lateral field marked as a faint space or linear depression junction of dorsal and ventral striae; dorsal arch low, rounded.
Vulva and tail terminus; phasmids large, distinct; vulva slit centrally located at unstriated area, nearly as wide as vulva-anus distance; perivulval region free of striae.

Male:

Body vermiform 1.1 to 1.3 mm long, anterior end tapering, posterior end bluntly rounded.
Body annuli large, distinct.
Lateral fields areolated with three incisures beginning near level of stylet knobs, two additional incisures starting near level of metacorpus.
Head capsule high and rounded, with a large labial and two post-labial annuli.
Lip region continuous with body contour; stoma slit-like, located in ovoid to hexagonal cavity, surrounded by pit-like openings of six inner labial sensilla; subventral and subdorsal lips fused to form median lips, each lip with two cephalic sensilla;
Amphid apertures elongated, located between labial disc and lateral lips.
Stylet robust 14 to16.2 um long; cone smaller than shaft, slightly increasing in diameter posteriorly; knobs rounded, reniform, distinctly indented, backwardly sloping.
Procorpus distinct; metacorpus ovoid, with a strong valve apparatus.
Secretory-excretory pore distinct, located four to six annuli posterior to hemizonid.
Testis single, occupying 58 % of body cavity length.
Spicules slightly curved ventrally with bluntly rounded terminu; gubernaculum short, crescent-shaped.
Tail short; phasmids distinct, located at cloacal aperture level.

Ref Le, et al., 2019

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

Distribution:

Described from Robusta coffee (Coffea canephora) in the Western Highlands of Vietnam

Economic Importance:

Nineteen species of Meloidogyne have been reported from coffee worldwide as of 2019 (Le et al., 2019).

M. africana	M. hapla	M. konaensis
M. arabicida	M. incognita	M. mayaguensis
M. arenaria	M. inornata	M. megadora
M. coffeicola	M. izalcoensis	M. moensi
M. daklakensis	M. javanica	M. oteifae
M. decalineata	M. kikuyensis	M. paranaensis
M. exigua

Feeding:

Sedentary endoparasite.

Feeding site establishment and development typical of genus.

Hosts:

Robusta coffee

For an extensive host range list for this species, click

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.

Egg masses within galled coffee roots.

Meloidogyne moensi causes inconspicuous galls or slight swellings on coffee roots. (Fig. 2n). Nutrient absorption is compromised by the infected root system, leading to stunting and chlorosis of the host plant. Coffee roots infected by have relatively small galls (1 â€“ 2 mm diam.), each gall containing several females with egg masses retained inside the gall (Le et al., 2019).

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Management:

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:

Le, T.M.L., Nguyen, T.D., Nguyen, H.T., Liebanas, G., Nguyen, T.A.D., Trinh, Q.P. 2019. A new root-knot nematode, Meloidogyne moensi n. sp. (Nematoda: Meloidogynidae), parasitizing Robusta coffee from Western Highlands, Vietnam. Helminthologia 56:229-246.

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.