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Journal of Dairy Science Vol. 30 No. 9 717-721
© 1947 by American Dairy Science Association ®
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The Amount of DDT found in the Milk of Cows Following Spraying1

D. E. Howell, H. W. Cave, V. G. Heller and W. G. Gross

Departments of Entomology, Dairying, and Agricultural Chemistry Research, Oklahoma Agricultural Experiment Station, Stillwater

ABSTRACT

Four lots of cattle were sprayed with DDT to determine the amount of this material that may appear in the milk following recommended and excessive treatment.

All animals tested excreted some DDT in the milk.

Animals sprayed with excessive amounts continued to eliminate DDT until the end of their lactation period, 119 and 126 days after the final spraying, but none after freshening.

Biological tests for toxicity of the milk to mice, mosquito larvae, and flies were negative.

FOOTNOTES

1 This work was aided by a grant from the American Cyanamid Company.






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