Temperature-Toxicity Relationships of Pyrethroids on Three Lepidopterans

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Abstract:

Larvae of the cabbage looper, Trichoplusia ni (Hübner), fall armyworm, Spodoptera Frugiperda (J. E. Smith), and tobacco budworm, Heliothis virescens (F.), were each topically bioassayed for permethrin, fenvalerate, and deltamethrin (S)-α- cyano-3-phenoxybenzyl cis-(lR)-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropanecarboxylate) toxicity at each of three temperatures (15.6, 26.7, and 37.8). Pyrethroid toxicity to T. ni and H. virescens was deltamethrin > fenvalerate > permethrin, whereas that of S. frugiperda was deltamethrin > permethrin > fenvalerate. All three compounds displayed a negative temperature coefficient for T. ni, as did permethrin for S. frugiperda, and permethrin and cypermethrin for H. virescens. Both fenvalerate and deltamethrin exhibited either neutral or positive temperature coefficients for S. frugiperda and H. virescens.

Document Type: Research Article

Publication date: August 1, 1982

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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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