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Acute Toxic Effects upon Livestock and Meat and Milk Residues of Dieldrin1

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Dieldrin was found to produce poisoning when applied dermally to young calves at 0.25%, young lambs at 3%, cattle at 2% and sheep and goats at 4%; lower concentrations did not produce poisoning under the conditions of this study. Higher concentrations were toxic in all cases. Horses tolerated 1% sprays.

When orally administered, dieldrin produced poisoning of young calves at 10 mg./kg., young pigs at 50 mg./kg., sheep at 25 mg./kg. and horses at 25 mg./kg.; lower doses were not toxic.

All treatments, single and multiple, produced residues in meat or milk. Fat analysis showed levels of 8 to 146 parts per million (p.p.m.) following treatment; milk showed 4.9 to 8.3 p.p.m. following 0.5% sprays.

Residues declined slowly, 16 to 24 weeks being required for fat to reach less than 1 p.p.m., 3 weeks for milk to return to less than 0.2 p.p.m.

Document Type: Research Article

Publication date: June 1, 1960

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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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