Downy Mildew
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<plantfyi-glossary slug="downy-mildew"></plantfyi-glossary>Definition
An oomycete disease producing downy, grayish-purple sporulation on the undersides of leaves, with yellowing above. Downy mildews are not true fungi but are closely related to water molds. They require wet conditions and devastate lettuce, grapes, and basil.
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