| 释义 |
downy mildew
noun
1. : a fungus of the family Peronosporaceae that is parasitic on higher plants (as grapes, potatoes, and various cucurbits) and that produces whitish masses of sporangiophores or conidiophores on the undersurface of the leaves of the host — called also false mildew
2. : a plant disease caused by a downy mildew — compare powdery mildew |