Diazinon Residues in the Milk of Dairy Cows1
Authors: BOURNE, JOHN R.; ARTHUR, B. W.
Source: Journal of Economic Entomology, Volume 60, Number 2, April 1967 , pp. 402-405(4)
Publisher: Entomological Society of America
Abstract:Fifteen lactating dairy cows were used in an experiment to determine the presence or absence of diazinon in the milk following dermal applications. Five cows were treated for 4 consecutive days with 2% diazinon dust at a rate of 2 oz per cow, 5 received diazinon applied from a back rubber for 10 consecutive days, and 5 were untreated. Milk samples were analyzed at 12 hr, 1, 3, 5, 10, and 15 days after the initial application of diazinon. An analytical method was used that converted the diazinon sulfur to hydrogen sulfide that was trapped in zinc acetate and measured spectrophotometrically as methylene blue at 670 mµ. Milk from 3 of the cows treated with the diazinon dust and 2 of the cows treated by the back rubber method contained detectable quantities of the insecticide at 12 hr after treatment. The residues persisted in the milk from 2 of the cows treated with the 2% dust for the first 24 hr after the initial application. Interference from extraneous materials in the milk was negligible; only 0.023±0.011 ppm of apparent diazinon was present in the control milk. The sensitivity of the analytical method was 0.046 ppm which corresponded to an absorbance of 0.036 or 9.2 µg of diazinon in 200 g of milk.
Document Type: Research Article
Publication date: April 1, 1967
- 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.
- Editorial Board
- Submit a Paper
- Subscribe to this Title
- Information for Advertisers
- Visit this journal's homepage
- ingentaconnect is not responsible for the content or availability of external websites