Deltamethrin residues in milk and tissues of lactating dairy cows
- 1 June 1992
- journal article
- research article
- Published by Taylor & Francis in Journal of Environmental Science and Health, Part B
- Vol. 27 (3) , 235-253
- https://doi.org/10.1080/03601239209372777
Abstract
Lactating dairy cows were fed deltamethrin (2 or 10 mg kg‐1 feed) for 28 consecutive days and deltamethrin residues measured in milk and tissues. Deltamethrin residues were higher relative to dose administered. The order of relative concentrations of deltamethrin in tissues, measured 1, 4, and 9 days after the last dose was: renal fat > subcutaneous fat > fore‐quarter muscle > hindquarter muscle > liver > kidney. Depletion of deltamethrin residues in milk was very rapid indicationg the half‐life of the insectide of about 1 day. Trace amounts of deltamethrin metabolites 3‐ (2,2‐dibromovmyl)‐2,2‐dimethylcyclopropane carboxylic acid (< 0.0235 ppm) and 3‐phenoxybenzoic acid (< 0.034 ppm) were also detected in milk and tissues of treated cows.Keywords
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