Residues of Terbufos (Counter®) in Iowa Corn and Soil
Authors: Sellers, Larry G.; Owens, John C.; Tollefson, Jon J.; Dahm, Paul A.
Source: Journal of Economic Entomology, Volume 69, Number 2, April 1976 , pp. 133-135(3)
Publisher: Entomological Society of America
Abstract:Field corn, sweet corn, popcorn, and soil from Iowa fields were analyzed for residues of terbufos (Counte®), O,O-diethyl S-[(tert-butylthio)methyl] phosphorodithioate. A granular formulation (Counter 15-G) was applied at the time of planting as a band or furrow treatment of 1, 2, and 4 lb AI/acre. Residues of terbufos, expressed as the fully oxidized sulfone (O,O-diethyl S-[(tert-butylsulfonyl)methyl) phosphorothiolate), in field corn forage ranged from a high of 0.43 ppm 40 days post-treatment (4-lb furrow application) to a nondetectable amount 60 days post-treatment (1-lb band application). No detectable residues were found in field corn grain, plus cob, harvested for silage (100 days post-treatment), and quantities in stover of the same maturity showed only 0.01–0.04ppm. Analyses of fully mature grain (160 days) showed no residues. Quantities of terbufos in soil where field corn was grown ranged from 78 ppm immediately after application (4-lb furrow application) to 0.3 ppm 160 days post-treatment (1-Ib band application). Sweet corn grain and popcorn grain sampled at edible maturity showed no residues of terbufos even though 10–14 ppm still were in the accompanying soil.
Document Type: Research Article
Publication date: 1976-04-01
- 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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