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downy mildew
- mildew on a plant which is marked by a whitish down composed of spore-forming hyphae, penetrating more deeply into the plant than powdery mildew.
noun: downy mildew
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- IPA[ˈdounē ˈmilˌdo͞o]
- mildew on a plant which is marked by a whitish down composed of spore-forming hyphae, ...
Oxford American Dictionary