单词 | downy mildew |
释义 | downy mildewnoun Compare powdery mildew 1. a serious plant disease, characterized by yellowish patches on the undersurface of the leaves, caused by the parasitic fungi of the family Peronosporaceae, such as Peronospora destructor: affects onions, cauliflower, lettuce, etc 2. any of the fungi causing this disease |
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