Joint Action of Diquat and Related One-Electron Transfer Agents with Propoxur and Fenthion Against Mosquito Larvae

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The toxicity and synergistic action of 2 bipyridylium herbicides which act by interfering with photosynthetic electron transport and 3 related compounds were investigated with propoxur and fenthion against larvae of Culex pipiens fatigans Wiedemann and Anopheles albimanus Wiedemann. The herbicides manifested insecticidal activity only at concentrations far in excess of those applied in practice for weed control. Sublethal but high concentrations, especially of diquat and 3,4-benzo-6,7-dihydrodipyrido[1, 2-a :2',1 '-c]pyrazinium dibromide, produced significant synergism of propoxur and fenthion, indicating that compounds capable of blocking the microsomal electron flow can potentiate the toxicity of certain insecticides, possibly by inhibition of microsomal detoxication processes.

Document Type: Research Article

Publication date: April 1, 1974

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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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