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Eighteen related synthetic compounds, most of them substituted piperonyl esters of dl-cis-trans-chrysanthemumic acid, were tested as space sprays on the Campbell turntable against house flies, Musca domestica L. The most toxic were the 6-bromo and 6-chloropiperonyl esters, the latter now known as barthrin. They were, respectively, about 21 and 31% as toxic as allethrin, and 51 and 88% as toxic as pyrethrins at the 50% mortality level. Above this level the ratios were higher, reaching at the 95% mortality level to about 25 and 50%, respectively, as toxic as allethrin, and 90 and 200% as toxic as pyrethrins. The knockdown value of the esters, although excellent at highly toxic concentrations, was much inferior to that of allethrin or pyrethrins at comparable concentrations.
Document Type: Research Article
Publication date: February 1, 1959
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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.