Control of Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) in stored peanuts using residual insecticides

Abstract

Five organophosphorus compounds, five synthetic pyrethroids and three insect growth regulators were assessed in the laboratory as potential protectants against Tribolium castaneum (Herbst) in peanuts stored at 30°C, 70% r.h. Activity against adults and progeny was assessed separately. Of the insecticides tested, chlorpyrifos-methyl, methacrifos and deltamethrin applied at 5 mg kg-1 completely prevented the development of progeny. Deltamethrin also had high potency against adults. Malathion had low potency against both adults and progeny owing to resistance in the test insects. Pirimiphos-methyl prevented the development of progeny at 25-50 mg kg-1 but had low potency against adults. © 1992.