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Journal of Dairy Science Vol. 55 No. 10 1499-1501
© 1972 by American Dairy Science Association ®
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Pesticide Residues in Tissues of First-Born Calves from Dams on Long-Time, Low DDT Intake1,2,

F. M. Whiting, W. H. Brown and J. W. Stull

Department of Dairy and Food Sciences, The University of Arizona, Tucson 85721

ABSTRACT

Three groups of unbred heifers consisting of four animals each were placed on one of three DDT intakes; 250, 500, or 1,000 ppb of the total feed consumed. After normal gestation and parturition, newborn calves were sacrificed from two dams in each group. Extractable lipid material from blood, brain, placenta, gonad, muscle, kidney, liver, and renal fat was analyzed for DDT and its metabolites. DDE was the most reliable indication of the dam's dietary pesticide history in most tissues whereas DDT and DDD were not as reliable. Muscle lipid gave no indication of dietary history of the dam. Renal fat contained highest pesticides.

FOOTNOTES

1 Arizona Agricultural Experiment Station Technical Paper 1888.

2 Supported in part by a grant from the United Dairymen of Arizona.






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Copyright © 1972 by the American Dairy Science Association ®.