Efficacy of Selected Granular Insecticides in Soil in 'Florunner' Peanut Fields to Larvae of Lesser Cornstalk Borer (Lepidoptera: Pyralidae)

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Survival of lesser cornstalk borer, Elasmopalpus lignose/lus (Zeller), larvae in soil from conventionally tilled and planted 'Florunner' peanut, Arachis hypogaea L., fields treated with selected granular insecticides at pegging was evaluated in Alabama and Florida in 1988 and 1989. Insecticides tested were chlorpyrifos, fonofos, butathiofos, ethoprop, tefluthrin, terbufos, and Fortress (0, O-diethyl 0-1,2,2,2,2, tetrachlorethyl phosphorothioate). Survival of lesser cornstalk borer larvae in untreated soil was 84.8 ± 2.1% (x ± SEM). Chlorpyrifos and fonofos significantly reduced larval survival compared with larval survival in soil from untreated plots 5-14 d after application in all four experiments. They were also the only insecticides that reduced larval survival at 25-28 d after application in three of the four experiments. Chlorpyrifos was the only insecticide that was effective for> 14 d in all four experiments. The length of effectiveness of chlorpyrifos, as indicated by laboratory bioassay, ranged from 19 to 67 d after treatment.

Document Type: Research Article

Publication date: December 1, 1991

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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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