Verticillium Wilt of Alfalfa in Wyoming. F. A. Gray, Associate Professor, Plant Science Division, University of Wyoming, Laramie 82071. D. A. Roth, Assistant Professor, Plant Science Division, University of Wyoming, Laramie 82071. Plant Dis. 66:1080. Accepted for publication 2 June 1982. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-1080.

Verticillium wilt of alfalfa, caused by Verticillium albo-atrum, was observed in Wyoming for the first time in the fall of 1981. The disease currently appears to be restricted to irrigated alfalfa in north-central Wyoming. The isolate of V. albo-atrum from alfalfa also was pathogenic on sainfoin in a greenhouse test.

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