downy mildew Hear it!

downy mildew definition

☆ downy mildew

a disease of angiosperms characterized by the appearance of whitish or downy patches of fungus on the surfaces of plant parts, caused by various fungi (family Peronosporaceae)

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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