Thirteen materials, including warfarin and 11 indandiones were tested for ability to kill adults of the confused flour beetle (Tribolium confusum Duv.) and to prevent larval development in corn meal baits. DDT was used as a standard lethal material. All baits used were prepared by mixing the test material with white corn meal. The highest concentration of test material used in initial tests was 0.5%. Subsequent tests at lower concentrations was made using the compounds which had proven effective at the 0.5% level. Survivors were determined after beetles had been allowed to feed for 7 days in the bait mixture. Of the compounds tested, only Pival and DDT were consistently effective against adult beetles. No live beetles were recovered from any of the DDT bait mixtures. The Pival baits yielded 24% survivors at the 0.5% level and 84% survivors at the 0.05% level. None of the other compounds tested showed appreciable effect against adults. After the adults had been removed from each bait, the mixture was set aside for 7 days and then observed for larval development. No larvae could be found in any of the baits containing DDT, Pival, isovalerylindandione or acetylindandione at the 0.2% level. Propionylindandione and heptanoylindandione showed some inhibitory effect at the 0.5% level, but not sufficient to warrant testing at the lower level. All the other compounds tested (including warfarin) were ineffective in preventing development of larvae.
Document Type: Research Article
Publication date: June 1, 1958
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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.