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An initial experiment was conducted in which dairy cows were fed one of 5 formulations of technical Rabonµ insecticide (2-chloro-l-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate) at levels ranging from 4.5 to 36 ppm of the total air-dry ration. Formulations ranging in size between 74 and 177 µ were more effective larvicides against the house fly than were formulations containing particles less than 74 µ (90% mortality vs. 6% mortality at 4.5 ppm) . In a field trial, manure from cows fed 30, 45, 60, and 90 ppm of technical Rabon (> 74 µ particle size) reduced larval populations by 81, 88, 93, and 98% compared with manure from control cows. Some of the milk samples from cows fed Rabon had low, but detectable (up to 0.015 ppm) , Rabon residues. In field-stacked manure piles originally containing up to 10 ppm Rabon, levels were down to 0.5 ppm in 8 days.
Document Type: Research Article
Publication date: August 1, 1972
More about this publication?
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.