Parasitus fimetorum and Macrocheles muscaedomesticae (Acarina:Parasitidae, Macrochelidae) as Natural Predators of the Root Knot Nematode, Meloidogyne javanica Treub

Résumé

Abstract The potential use of two predacious mites,Parasitus fimetorum(Berlese 1904) andMacrocheles muscaedomesticae(Scopoli 1972), for controlling the root knot nematode,Meloidogyne javanicaTreub 1885 was evaluated under laboratory and semi-field conditions. Obtained results revealed that the 2 predators significantly reduced the root knot nematode numbers.In addition, the highest reduction percentage (57.24%) in nematode juveniles was recorded at the treatment of (1000 nematode + 10 mites). ForM. muscaedomesticae,the highest mortality percentage (50.83%) in nematode juveniles was recorded at the treatment of (1000 nematode + 50 mites), followed by (1000 nematodes + 20 mites) 48.88%, while the treatment of (1000 nematode + 10 mites) gave (47.13%). The combination of the 2 mite species (1000 nematodes + 50 mites/species) caused the highest mortality percentages in nematode juveniles (69.29%), followed by (1000 nematodes + 20 mite/species) 50.51% and the treatment of (1000 nematode + 10 mite/species) (37.66%). At the pot experiments, the highest overall mortality percentage inM. javanicajuveniles was recorded at the treatment ofP. fimetorum+M. muscaedomesticaegiving (57.07%), followed by the treatment ofP. fimetorum(39.17%), and then, byM. muscaedomesticaealone that recorded only (17.47%). In conclusion, predacious mites can be partially considered a control tool of the parasitic nematodes.

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