Rotylenchus wimbii




Rev 05/24/2022

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Morphology and Anatomy Life Cycle
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           Rotylenchus wimbii Singh, Karssen, Gitau, Wanjau, Couvreur, Pili, Gheysen & Bert, 2021


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Morphology and Anatomy:



  • Moderatly-sized soil nematodes (0.6-0.8mm),

  • Lateral field starting as single areolated band, gradually forming two areolated bands up to level of metacorpus valve and continuing as three areolated bands up to isthmus level, after which bands becomes smooth till tail terminus.

  • Labial region hemispherical with 4 annuli, not offset from body but with a slight depression under LM.

  • Rounded labial disc, not elevated, slit like oral aperture, lateral sectors with two amphidial apertures and smaller than subdorsal and subventral sectors.

  • Basal lip annule with 2 to 3 longitudinal striations  forming 3 to 4 irregular blocks,

  • Stylet robust with large, rounded, and sometimes indented knobs.

  • Dorsal pharyngeal gland opening at 4 to 6um from stylet base.

  •  Pharynx with well-developed median bulb, valves, slender isthmus, and gland overlapping intestine dorsally.

  • Secretory-excretory pore often at level of pharyngo-intestinal junction. Hemizonid distinct, just above secretory-excretory pore, about two body annuli long.

  • Reproductive tract didelphicamphidelphic, each branch equally developed with outstretched ovaries containing rows of developing eggs,

  • Vulva at 55 to 60% of body length from anterior end, without distinct epiptygma.

  • Spermatheca indistinct to rounded, not filled.

  • Tail very short with commonly truncated tip or sometimes slightly hemispherical to rounded tip. Phasmid pore like, 7 to 17 annuli anterior to anus


 Males not seen

Ref: Singh et al., 2021


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



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Described from specimens associated with finger millet ropots in Kenya.

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Economic Importance:



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Obligate parasites of plant roots. Migratory ectoparasitic species; also observed feeding endoparasitically in finger millet, Eleusine coracana (Singh et al., 2021).


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Carrot and others

For an extensive host range list for this species, click

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Life Cycle:

Ecophysiological Parameters:

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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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Singh, P.R., Karssen, G., Gitau, K., Wanjau, C., Couvreur, M., Pili, N., Gheysen, G., Bert, W. 2021.Rotylenchus wimbii n. sp. (Nematoda: Hoplolaimidae) associated with finger millet in Kenya. J. Nematology 53: | DOI: 10.21307/jofnem-2021-016.
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Copyright © 1999 by Howard Ferris.
Revised: May 24, 2022.