| 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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