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First Report of Powdery Mildew of Stachys byzantina (Lamb’s Ear) Caused by Neoerysiphe galeopsidis in North America

D. A. Glawe and S. T. Koike

December 2007


During the summer of 2007 the authors encountered a previously unrecorded powdery mildew disease on several plants of the perennial ornamental plant Stachys byzantina K. Koch ex Scheele (common names: woolly hedgenettle, woolly betony, and lamb’s ear) growing in a plant bed near a commercial building in Salinas (Monterey Co.), California. This report documents the occurrence of Neoerysiphe galeopsidis on this host in North America.


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