Insecticides for the control of dieldrin-resistant banana weevil borer, Cosmopolites sordidus Germar

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Abstract
Field trials were carried out in the Brunswick River district of New South Wales from 1971 to 1975 to evaluate insecticides against dieldrin-resistant banana weevil borer, Cosmopolites sordidus Germar. Effective control was obtained by spraying the bases of plants and surrounding soil to a radius of 30 cm in spring and autumn with pirimiphos-ethyl and chlorpyrifos emulsions at 2.24 kg active ingredient ha-1 (1.12g per plant) per application. Chlordecone dust, pirimiphos-ethyl granules and chlorpyrifos powder sprinkled by hand at 2.8 kg ha-1 a.i. (1.42 g per plant) per application also gave effective control and could be used where water is unavailable.

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