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Establishment of the imported parasitePentalitomastix plethoricus [Hym.: Encyrtidae], onEctomyelois ceratoniae [Lep.: Phycitidae] in Israel

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Abstract

Pentalitomastix plethoricus Calt. was imported to Israel to aid in the biological control ofEctomyelois ceratoniae (Zell.). Two to 3 years following release in almonds the parasite was found established onE. ceratoniae with 12–15% parasitism. In carob plantations, on the other hand, 3 to 5 years after release the parasite was not recovered fromE. ceratoniae. We suggest that the type of host plant — almond in this case — is a determining factor for establishment of the parasiteP. plethoricus.

Résumé

Pentalitomastix plethoricus Caltagirone, parasite polyembryonnaire, a été importé de Californie en Israël pour aider dans la lutte biologique contreEctomyelois ceratoniae (Zeller), nuisible au fruit. Le parasite a été élevé en masse surE. ceratoniae et libéré dans des plantations de caroubier et d'amandier. Deux et 3 ans après sa libération le parasite a été retrouvé sur des amandiers où il a parasité 12% à 15% des chenilles deE. ceratoniae. C'est un degré de parasitisme élevé en comparaison avec le faible taux de parasitisme, environ 1%, deE. ceratoniae par des parasites indigènes. Dans des plantations de caroubiersP. plethoricus n'a pas été retrouvé. Il semble donc que la plante-hôte joue un rôle décisif dans l'établissement de ce parasite.

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Gothilf, S. Establishment of the imported parasitePentalitomastix plethoricus [Hym.: Encyrtidae], onEctomyelois ceratoniae [Lep.: Phycitidae] in Israel. Entomophaga 23, 299–302 (1978). https://doi.org/10.1007/BF02373105

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