Fluorinated Analogs of DDT as Toxicants and DDT Synergists1

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The insecticidal activities and ability to synergize DDT of 16 fluorine-containing structural analogs of DDT were determined.

Of the 2,2-difluoro-1,1-di-p-halophenyl derivatives of ethane, ethanol and ethyl acetate, the p-bromo- and p-chloro- compounds were about equally toxic to susceptible house flies (Musca domestica L.) and the p-fluoro-compounds were less toxic. The ethane, ethanol, and ethyl acetate derivatives decreased in toxicity in the order given. The t1uorodiphcnylethenes were not significantly toxic to house flies.

Maximum synergistic activity with DDT occurred in those derivatives containing p-chloro- or bromo-groups, fluoro- being inferior in all cases. Synergistic activity varied with the nature of the group attached to the alpha carbon atom in the following order: OH>H>OCOCH3. The fluorodiphenylethenes were the least active p-halophenyl synergists. The difluorodiphenyl compounds containing no halogen substituent in the benzene ring were devoid of synergistic activity.

Document Type: Research Article

Publication date: August 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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