Downy Mildew
Downy Mildew is a group of fungus-like diseases that are often confused with botrytis, Powdery Mildew and other foliage diseases. Downy Mildew often starts with white to bluish-white, fluffy growth on the undersides of the leaves, and yellow spots on the tops of the leaves. As the infected area dies, it can turn yellow to brown, purplish, reddish-black or bleached white, and the fluffy growth turns grayish.
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