Residues in Fatty Tissues, Brain, and Milk of Cattle from Insecticides Applied for Grasshopper Control on Rangeland
Author: DIVISION, ENTOMOLOGY RESEARCH
Source: Journal of Economic Entomology, Volume 52, Number 6, December 1959 , pp. 1206-1210(5)
Publisher: Entomological Society of America
Abstract:In 1956 cattle exposed to rangeland treated with aldrin at 2 ounces per acre for different periods averaged 1.4 to 10.9 p.p.in. of dieldrin in the fat at slaughter.
In 1957 steers were exposed for 58 to 90 days to rangeland treated with 2 oz. of aldrin, 3 oz. heptachlor or ¾ oz. of dieldrin per acre then confined in a feed lot for 93 or 100 days. Dieldrin residues from the aldrin treatment were about 4 p.p.m. in the fat when the animals were removed from the range and about 0.9 p.p.m. when slaughtered. Heptachlor epoxide residues from the heptachlor treatment were of the same magnitude. Residues from dieldrin were about 7 p.p.m. when the animals were removed from the range and 1.4 p.p.m. when slaughtered
In 1958 cattle were grazed for 96 or 103 days on ranges treated with 2 ounces of aldrin or heptachlor per acre in diesel oil or emulsion or 1½ pounds of toxaphene in diesel oil and then confined in a feed lot for 120 days before slaughter. Dieldrin and heptachlor epoxide residues were about the same as found in 1957. Slaughter samples showed that aldrin residues were only slightly affected by the formulation but heptachlor epoxide residues were lowest in animals on the emulsion-treated range. In animals exposed to toxaphene the residues were less than 0.5 p.p.m. Milk from cows exposed to range treated with heptachlor at 2 ounces per acre showed heptachlor epoxide residues of 13.3 p.p.m. in the butterfat (about 0.5 p.p.m. in the milk) after 28 days and 1 p.p.m. after 165 days.
Document Type: Research Article
Publication date: December 1, 1959
- 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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