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Methoxychlor in amounts of less than 0,1 p.p.m. was found in the milk of herds dusted for horn fly (Haernatotia irritans (L.)) control with approximately 10 g. per cow of 50% methoxychlor wettable powder. The contamination was presumably of extraneous origin rather than by excretion in the milk. Under practical conditions, herds are dusted at approximately 3-l\'eek inter- vals so extraneous contamination would he expected to occur simultaneously on only a few farms in all area. Upon dilution with other milk from the area, the slight contamination occurring on individual farms at any given time should result in methoxychlor residues of less than 0.01 p.p.m, in commercial milk.
Document Type: Research Article
Publication date: October 1, 1961
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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.