Mildew on a plant that is marked by a whitish down composed of spore-forming hyphae, penetrating more deeply into the plant than powdery mildew.
- Family Peronosporaceae, subdivision Mastigomycotina
- Both powdery mildew and downy mildew often infect squash plants as autumn nights grow cooler and dew keeps the foliage moist through the night.
- Climatic conditions are conducive to the development of several major grape diseases, including: black rot, downy mildew and powdery mildew.
- On cultivars highly susceptible to downy mildew and powdery mildew, some post harvest application may be required to protect foliage and prevent premature defoliation.
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Syllabification: down·y mil·dew
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