Driver D, Brewer R N, Cottier G J
Poult Sci. 1976 Jul;55(4):1544-9. doi: 10.3382/ps.0551544.
Eighty-four Single-Comb While Leghorn laying hens housed individually in laying cages were fed rations containing less than 0.1 p.p.m. of dieldrin, DDT, heptachlor and mirex individually or in combination for 7 days and in combination for 15 weeks. DDT residues in egg yolk reached 0.043 p.p.m. by 7 days when fed in combination with the other pesticides. None of the residues were above FDA action level at 7 days and all had declined to below trace levels by 8 weeks after termination of pesticide feeding. Residues in eggs from hens fed all four pesticides for 15 weeks increased steadily for the first few weeks and then reached a plateau or increased only slightly until pesticide feeding was terminated. By the end of the 5th week of pesticide feeding all pesticides except DDT had exceeded FDA action levels for pesticides in eggs. DDT residues reached a level of 0.139 p.p.m. by 8 weeks and did not increase thereafter. Traces of the pesticides were still present 24 weeks after termination of pesticide feeding. The pesticides tested did not affect fertility of hatchability of eggs collected during the 14th and 15th weeks of pesticide feeding. Total carcass fat of chicks hatched from these eggs had 0.024 p.p.m. dieldrin, .049 p.p.m. DDT, .001 p.p.m. heptachlor epoxide and, 0.47 mirex at 1 day of age.
84只单独饲养在产蛋笼中的单冠白来航蛋鸡，分别或组合喂食含有低于0.1 ppm狄氏剂、滴滴涕、七氯和灭蚁灵的日粮7天，并组合喂食15周。当与其他杀虫剂组合喂食时，7天时蛋黄中的滴滴涕残留量达到0.043 ppm。7天时所有残留量均未超过美国食品药品监督管理局（FDA）的行动水平，并且在停止喂食杀虫剂8周后，所有残留量均降至痕量水平以下。喂食所有四种杀虫剂15周的母鸡所产鸡蛋中的残留量在最初几周稳步增加，然后达到平稳状态或仅略有增加，直至停止喂食杀虫剂。在喂食杀虫剂第5周结束时，除滴滴涕外的所有杀虫剂均已超过FDA规定的鸡蛋中杀虫剂的行动水平。8周时滴滴涕残留量达到0.139 ppm，此后不再增加。停止喂食杀虫剂24周后，仍有微量的杀虫剂存在。所测试的杀虫剂并未影响在喂食杀虫剂第14周和第15周收集的鸡蛋的孵化率。由这些鸡蛋孵化出的雏鸡在1日龄时，胴体总脂肪中含有0.024 ppm狄氏剂、0.049 ppm滴滴涕、0.001 ppm七氯环氧化物和0.47 ppm灭蚁灵。
