J. Anim Sci.
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J. Anim Sci. 1982. 55:180-184.
© 1982 American Society of Animal Science
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Comparative Fescue Foot Potential of Fescue Varieties1

C. N. Cornell2, G. B. Garner2, S. G. Yates3 and S. Bell4

University of Missouri, Columbia 65211 and US Department of Agriculture, Peoria, IL 61604

Abstract

Five varieties of tall fescue were winter-grazed by steers and evaluated for their fescue foot toxicity potential. In order of their relative toxicity, the varieties were Ky-31, Kenhy, Mo-96, Kenmont and Fawn. Ky-31 was the most tcxic in two of three annual grazing experiments. Kenhy, Mo-96 and Kenmont were intermediate in toxicity as measured by visual observations of knuckling, lameness, swelling about the dewclaws, and tail tip or coronary band necrosis. Fawn was consistently least toxic. Average daily gain in winter trials during the 3-yr period was highly variable because of seasonal differences. There did not appear to be a relationship between gain and relative toxicity. Only one steer developed clinical signs severe enough to warrant removal from the experiment.

Footnotes

1 Contribution from the Missouri Agr. Exp. Sta., Journal Ser. No. 8871, approved. These experiments were conducted under Cooperative Agreement 58-519B-9-815 between the Northern Regional Research Center, SEA, USDA and the Missouri Agr. Exp. Sta.

2 Dept. of Biochem., Univ. of Missouri, Columbia 65211.

3 Northern Regional Research Center, AR, SEA, USDA, Peoria, IL 61604. The mention of firm names or trade products does not imply they are endorsed or recommended by the USDA over other firms or similar products not mentioned.

4 Southwest Missouri Center, Mt. Vernon, MO 65712.






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Copyright © 1982 by the American Society of Animal Science.