downy mildew
any of various fungi of the family Peronosporaceae parasitic on e.g. grapes and potatoes and melons • Syn: false mildew • Hypernyms: mildew • Hyponyms: blue mold fungus, Peronospora tabacina, onion mildew, Peronospora destructor, tobacco mildew, Peronospora hyoscyami • Member Holonyms: Peronosporaceae, family Peronosporaceae
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