powdery mildew

noun

Definition of powdery mildew

1 : an ascomycetous fungus (family Erysiphaceae) producing abundant powdery conidia on the host
2 : a plant disease caused by a powdery mildew

Recent Examples of powdery mildew from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'powdery mildew.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of powdery mildew

1889


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