Lindane residues on pasture and in the fat of sheep grazing pasture treated with lindane prills

摘要

Sheep pasture was topdressed with lindane (20) prills at the rate of 2 lb active ingredient per acre. Residues in the fat of sheep grazed for seven-10 days initially on the pasture after withholding periods of nil, nine, 17, and 27 days were 4.0, 1.8, 0.7, and 0.4 p.p.m. lindane respectively (mean values for four sheep). When these sheep were transferred to untreated pasture, lindane was eliminated rapidly from their fat, all sheep having less than 0.5 p.p.m. lindane at one month and less than 0.1 p.p.m. lindane at two months after their last exposure to the insecticide.