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Comparative control of the banana weevil, Cosmopolites sordidus, by the fungal pathogen, Beauveria bassiana, and some insecticides when used in combination with pseudostem trapping Ogenga-Latigo, M.W. & Masanza, M. Abstract Field evaluation was made of the effect of the fungal pathogen, Beauveria bassiana (Bals.) Vuillemin (Isolate KB/91/3), and Dursban, Primicid and Furadan insecticides on the banana weevil, Cosmopolites sordidus Germar. When the treatments were combined with pseudostem trapping, population of the banana weevil declined sharply. In the first four weeks after application, B. bassiana did not cause significant mortality of the weevil, while high mortalities were recorded for the insecticides, particularly Dursban. Monitored over a longer period (2-5 months), however, all the treatments significantly (P<0.05) suppressed weevil population compared to the control. Beauveria bassiana was more persistent than the chemical insecticides, particularly when used without pseudostem traps. It is suggested that comprehensive field trials be carried out to confirm the findings of this study. Keywords Biopesticides, banana borer, entomopathogens, pesticides

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Ogenga-Latigo, M.W. & Masanza, M. Résumé Une evaluation a ete menee sur le champ sur l'effet du pathogene fungale, Beauveria bassiana (Bals.) Vuillemin (Isolate KB/9113), et les insecticides appelees Dursban, Primicide et Furadan utilisees sur les charancons de la banane, Germar cosmopolites sordidus. Quand les traitements etaient combines avec les signes du pseudostem, la population des charancons de la banane a connu un moindre declin. Au cours de la premiere semaine de la mise en application, B. Bassiana n'a pas cause de cas des mortalites considerables de charancons alors que des cas des mortalites elevees etaient remarques du cote insecticides, plus particulierement le Dursban. Apres un controle pendant une longue periode (de 2 a 5 mois), il ya eu cependant, tous les traitements qui ont considerablement domine la population des charancons (P<0.05). Le type Beauveria bassiana etait plus persistant que les autres produits chimiques d'insecticides, particulierement lors qu'ils sont utilises avec les pieges pseudostem. Il a ete conseille que les essaies complets soient menes pour determiner les resultats de cette recherche. Mots Clés Biopesticides, la banane, entomopathogene les pesticides

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