A Study of Residues of Some Commonly Used Insecticides on Alfalfa1

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Alfalfa treated with dieldrin, heptachlor and malathion at Practical rates was sampled at intervals and analyzed for insecticide residues. Heptachlor and malathion residues on green forage were below tolerance levels within 10 days. Residues from granulated heptachlor applied at 3 and 5 pounds per acre persisted for 20 to 30 days. Dieldrin spray residues of over 0.1 p.p.m. persisted after 30 days. Residues from dieldrin and malathion dusts were less persistent than those from sprays.

Document Type: Research Article

Publication date: June 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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