Residue Analysis of Leptophos, Its Oxygen Analogue, and Its Phenol in Field-treated Wheat Plants1,2
Authors: STRUBLE, D. L.; MCDONALD, S.
Source: Journal of Economic Entomology, Volume 66, Number 6, December 1973 , pp. 1321-1325(5)
Publisher: Entomological Society of America
Abstract:Field-grown plants were treated at the early tillering stage with leptophos (0-[4-bromo-2,5-dichlorophenyl] 0- methyl phenylphosphonothioate) EC, 1970 formulation, at 0.56 and 1.12 kg Al/ha. Recoveries from fortified plant samples ranged from 70 to 102% for leptophos, from 51 to 99% for its oxygen analogue (0-[4-bromo-2,5-dichlorophenyl] O-methyl rhenylphosphonate), and from 68 to 97% for its pheno (4-bromo-2,5-dichlorophenol). Straw harvested 63 days posttreatment contained 0.07 ppm or less leptophos, 0.01 ppm or less of the phenol, and the oxygen analogue was not detectable (<0.02 ppm). Residues were not detected in the wheat kernels. The leptophos residue was diluted by plant growth, but the main disappearance of leptophos appeared to be due to degradation or physical losses, or to both.
Document Type: Research Article
Publication date: December 1, 1973
- 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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