DDT and Synthetic Pyrethroids: Mode of Action, Selectivity, and Mechanism of Synergism in the Tobacco Budworm (Lepidoptera: Noctuidae) and a Predator, Chrysopa carnea Stephens (Neuroptera: Chrysopidae )
Authors: Chang, C. P.; Plapp, F. W.
Source: Journal of Economic Entomology, Volume 76, Number 6, December 1983 , pp. 1206-1210(5)
Publisher: Entomological Society of America
Abstract:Specific binding sites for DDT and cis-permethrin have been detected in the central nervous system of the tobacco budworm, Heliothis virescens (F.), and its predator, Chrysopa cornea Stephens. Competition studies indicated these insecticides compete for the same receptors, but not precisely the same site. In the tobacco budworm, binding of the insecticides to the receptors appeared to be stable. Conversely, in Chrysopa, binding of insecticides to receptors was readily reversible. The difference in receptor binding between species can be correlated with the selective toxicity of the insecticides to the tobacco budworm as compared with that with Chrysopa. Chlordimeform, a known synergist for these insecticides, significantly increased the specific binding of DDT and cis-permethrin to the receptors in the pest. The results of this study suggest a possible method to directly measure the sensitivity of insect target sites to synthetic pyrethroids, to evaluate selectivity, and to detect potential target site synergists for these insecticides against pest insects.
Document Type: Research Article
Publication date: 1983-12-01
- 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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