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First Report of Powdery Mildew of Onion (Allium cepa) Caused by Leveillula taurica in the Pacific Northwest

L. J. du Toit, D. A. Glawe, and G. Q. Pelter

November 2004

Brief

A powdery mildew disease of onion has been observed infrequently in the Columbia Basin of Washington State since 1996, but this is the first published report of this disease in the Pacific Northwest. The causal agent was determined to be Leveillula taurica (Lév.) G. Arnaud.

doi:10.1094/PHP-2004-1129-01-HN

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