Laboratory Evaluation of Several Chemical Protect ants Against the Southern Cowpea Weevil, Callosobruchus chinensis, on Stored Dried Beans in Korea1

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Laboratory experiments were conducted to compare the effectiveness of emulsifiable and dust formulations of Bayer 29493 (0,0-dimethyl 0-[4-(methylthio)-m-tolyl] phosphorothioate), Pyrenone Grain Protectant® (0.08% pyrethrins, 1.20% piperonyl butoxide), Dipterex® (0,0-dimethyl 2,2,2-trichloro-lhydroxyethyl phosphonate) and agricultural grade malathion as protectants for small red beans (Phaseolus angularis) from damage by Callosobruchus chinensis (L.). Where direct comparisons permitted, the emulsifiables proved generally more effective than the dusts. Bayer 29493 emulsifiable as low as 4 ppm gave longer and better protection than other materials. Malathion EC at 4 ppm and Bayer 29493 dust at 16 ppm were second in general efficacy. Pyrenone Grain Protectant dusts containing 1.6 and 2.4 ppm pyrethrins and 24 and 36 ppm piperonyl butoxide in one trial compared favorably with Bayer 29493 EC at 4 ppm and malathion EC at 2 and 4 ppm 30 days after application. While Bayer 29493 EC, malathion EC and Pyrenone Grain Protectant dust show promise against C. chinen-

Document Type: Research Article

Publication date: October 1, 1963

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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