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Studies of Feeding Aldrin to Dairy Cows

Bureau of Dairy Industry

P. E. Hubanks, R. H. Carter and F. W. Poos

Bureau of Entomology and Plant Quarantine, U.S. Department of Agriculture, Washington, D.C.

ABSTRACT

Aldrin¹ effectively controls many forage insects and is widely used as a pesticide. Range grasshoppers, for example, can be controlled completely with a spray applied at a dosage of 2 oz. of Aldrin per acre. Information on the excretion of Aldrin in the milk of dairy animals is extremely limited.

Kitselman et al. (5) studied the toxicity symptoms and tissue concentrations of Aldrin when fed to sheep, beef cattle, and dairy cattle but did not report on the excretion of Aldrin in milk.

The purpose of this study was to: (a) ascertain the concentration of Aldrin in the milk of dairy cows fed hay made from Aldrin-sprayed forage, (b) determine the approximate dosage of orally administered Aldrin necessary for detection by chemical analysis in the milk of dairy cows, and (c) ascertain the relation of various intake levels of Aldrin to the concentration of this insecticide in milk.

EXPERIMENTAL PROCEDURE

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