Subchronic Toxicity of Four Chlorinated Dimethanonaphthalene Insecticides to Chicks1

Abstract

The subchronic toxicities to New Hampshire chicks of aldrin, dieldrin, isodrin, and endrin were compared over a 42-day period. Sever-day-old chicks were placed on rations containing graded amounts of these insecticides. Whereas aldrin and dieldrin caused approximately 20% mortality when fed 50 ppm, their respective stereoisomers caused over 90% mortality at 12 ppm. Practically no mortality occurred at the lower levels fed in this investigation. Data on weight gain, feed consumption and efficiency of feed conversion are also given.