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Journal of Dairy Science Vol. 16 No. 5 427-433
© 1933 by American Dairy Science Association ®
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The Effects of Some Fly Sprays on the Hides and on the Body Temperatures of Dairy Cows1

John L. Wilson, A. M. Pearson and C. Y. Cannon

Iowa Agricultural Experiment Station, Ames, Iowa

ABSTRACT

Twelve fly repellent oils sprayed at the rate of two fluid ounces per day differed widely in their physiological effects upon the skin of dairy cattle.

Seven of them caused no skin injury when sprayed over a two months' period. Five oils caused noticeable injury as indicated by loss of hair and cracking or peeling of the skin. The injury was most evident on those portions of the body most exposed to the sun's rays. The amount of injury caused by the sprays was influenced by the method of application. Cows varied in their susceptibility to skin injury.

During periods in which the maximum daily air temperatures averaged 86° F. the body temperatures of sprayed animals were slightly higher than those of unsprayed animals. The temperatures of the cows sprayed with 5 of the 11 oils did not show marked variations from those of the unsprayed cows. Application of the other 6 oils caused definite, though not dangerous, temperature rises. The elevations of body temperatures were more pronounced at higher air temperatures.

We are indebeted to the Standard Oil Company, of Indiana, for establishing the fund and furnishing the materials used in this project. To Messrs. C. R. Cleveland, E. H. Hillman and H. J. Saladin of the Standard Oil Company we are grateful for their personal aid in the work. Much valuable cooperation was also given by Dr. C. H. Richardson of Iowa State College.

FOOTNOTES

1 Journal Paper No. B68 of the Iowa Agricultural Experiment Station, Ames, Iowa.






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