Toxicity of Some Alkylbenzyl Esters of Chrysanthemumic Acid and Two Related Esters in Comparison with Allethrin and Pyrethrins as House Fly Sprays1

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Twelve related synthetic compounds, most of them mono- and di-alkylbenzyl esters of dl-cis-trans-chrysanthemumic acid, were tested as space sprays against house flies, Musca domestica L. The most toxic were the p-ethylbenzyl and 2,4-dimethylbenzyl esters. They were, respectively, about 21 and 17% as toxic as allethrin, and 52 and 54% ns toxic as pyrethrins at the 50% mortality level. Above this level the ratios were higher, reaching at the 95% mortality level to 31 and 20%, respectively. as toxic as allethrin and 88 and 91% as toxic as pyrethrins. The 3,4- dimethyl benzyl ester was about two-thirds as toxic as its 2,4- isomer. Saturation of the double bond in the acid component of this 2,4-isomer produced a compound one-third as toxic as the unsaturated compound. The knockdown value of the new 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: June 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.
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