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Fate and Efficacy of O-[4-[(4-Chlorophenyl)thio]phenyl]O-Ethyl S-Propyl Phosphorothioate (RH-0994) after Application to the Tobacco Budworm (Lepidoptera: Noctuidae) and the Boll Weevil (Coleoptera: Curculionidae)

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Studies with the 14C-labeled experimental insecticide RH-0994 (O-[-[(4-chlorophenyl)thio]phenyl] O-ethyl S-propyl phosphorothioate) demonstrated that adult boll weevils (BWv). Amthonomus grandis Boheman, absorbed topical doses of the compound at a significantly slower rate than 3rd-instar, insecticide-susceptible (S-TBW) or field-collected (F-TBW) tobacco budworms, Heliothis virescens (F.), and that absorption by F-TBW was significantly slower than for S-TBW. In tests of the topical toxicity of RH-0994 against third-stage TBW and adult BWv, the order of susceptibility was S-TBW > F-TBW > BWv. Comparative studies of the metabolism of [14C]RH-0994 by fifth stage S- and F-TBW larvae indicated the insects metabolized oral doses of the compound rapidly at about equivalent rates and produced the same array of metabolites. Field tests of RH-0994 (0.84 and 1.12 kg/ha) against natural populations of Heliothis spp. in cotton indicated that control was comparable to that afforded by sulprofos (1.12 kg/hal and f1ucythrinate (28.0 and 44.8 g/ha).

Document Type: Research Article

Publication date: April 1, 1983

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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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