Oscheius myriophilus

Oscheius myriophilus	Contents	Rev 03/11/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Oscheius Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Rhabditidae Menu	Feeding	References
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Rhabditoidea

Rhabditidae

Oscheius myriophilus Poinar, 1986

Morphology and Anatomy:

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

Distribution:

Oscheius. myriophilus is frequently isolated from millipedes and crickets.

Entomopathogenic nematodes with endosymbiont bacteria of the genera Serratia and Enterococcus The bacteria are toxic to insects and provide the nematyode with a necromenic bacterail food source in the decomposing insect corpse.

In the case of O. myriophilus, the bacterial endosymbionts include Serratia nematodiphila and S. marcescens (Ghavamabad et al., 2021; Zhang et al., 2009).

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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

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Ecosystem Functions and Services:

The endosymbiotic necromenic relationship of O. myriophilus with the toxic Serratia bacteria was applied in laboratory stuidies for control of boxtree moth (BTM) and fall webworm (FWW). A suspension of 500 infective juveniles per ml (IJs/ml) of the nematode was the most effective treatment on fifth instar larvae of BTM and FWW, causing 100 and 95% mortality after 48 h, respectively. The lethal concentration 50 (LC50) values of the nematode were 74.5, 152.7, 99.9, and 197.3 IJs/ml on fifth and fourth instar larvae of BTM, and fifth and fourth instar larvae of FWW, respectively, after 48 h at 25C and 60% relative humidity.

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Management:

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References:

Ghavamabad, R.G., Talebi, A.A., Mehrabadi, M., Farashiani, M.E., Pedram, M. 2021. First record of Oscheius myriophilus (Poinar, 1986) (Rhabditida: Rhabditidae) from Iran; and its efficacy against two economic forest trees pests, Cydalima perspectalis (Walker, 1859) (Lepidoptera: Crambidae) and Hyphantria cunea (Drury, 1773) (Lepidoptera: Erebidae) in laboratory condition. J. Nematology 53: | DOI: 10.21307/jofnem-2021-035

Poinar, G. O. 1986. Rhabditis myriophilus n sp. (Rhabditidae: Rhabditida), associated with the millipede, Oxidis gracilis (Polydesmida: Diplopoda). Proceedings of the Helminthological Society of Washington 53:232-236

Zhang, C. X., Yang, S., Xu, M. X., Sun, J., Liu, H., Liu, J. R., Liu, H., Kan, F., Sun, J. and Lai, R. 2009. Serratia nematodiphila sp. nov., associated symbiotically with the entomopathogenic nematode Heterorhabditidoides chongmingensis (Rhabditida: Rhabditidae). International Journal of Systematic and Evolutionary Microbiology 59:1603-8, Available at: https://doi.org/10.1099/ ijs.0.65718-0.

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