Effects of a supplemental deltamethrin and piperonyl butoxide diet on levels of residues in products of animal origin. 2. Feeding study in poultry

Feeding of chickens for almost all their lives with cereals treated with deltamethrin and piperonyl butoxide at the maximum recommended rates did not result in detectable residues of piperonyl butoxide in muscle, fat, skin, or liver. Deltamethrin residues were about 0.003 mg/kg in fat, 0.01 mg/kg in skin, and less than 0.002 mg/kg in muscle and liver. No detectable residues of either deltamethrin or piperonyl butoxide were found in eggs from laying hens fed for 12 weeks on the same diet. Analyses were performed by gas chromatography with electron capture detector (for deltamethrin) and high-pressure liquid chromatography with UV detector (for piperonyl butoxide), after appropriate solvent extraction and cleanup