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Insecticidal Residues in Milling Fractions from Wheat Treated with Methoxychlor, Malathion, and Lindane1

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Milling tests were conducted to determine the insecticide residue in flour derived from .wheat to which three candidate protective treatments had been applied as dusts or sprays at several rates. Some lots were milled 9 to 10 days after treatment and others after aging 18 to 24 months. Samples analyzed were the wheat just before and after cleaning, and the flour, bran, shorts, and germ. In most cases, cleaning removed only a small amount of insecticide. The highest residues were in the bran and shorts. Very little insecticide carried over into the flour, 0 to less than 0.3 p.p.m. from malathion applied at 2.5 to 7.5 p.p.m.; 0.3 to 1.8 p.p.m. from methoxychlor applied at 5 to 50 p.p.m.; and 1.3 to 2.6 p.p.m from lindane applied at 2.5 to 7.5 p.p.m.

Document Type: Research Article

Publication date: August 1, 1958

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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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