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A site that provides for maximum air drainage which promotes faster drying of foliage can substantially reduce the risk of black rot and downy mildew.
They will also provide excellent control of black rot , but it is important to remember that they will not control downy mildew.
It is important to remember that powdery mildew can be a serious problem during growing seasons when it is too dry for most other diseases, such as black rot or downy mildew, to develop.
Climatic conditions are conducive to the development of several major grape diseases, including: black rot , downy mildew and powdery mildew.
At this advanced stage, Phomopsis fruit rot can be easily mistaken for black rot .
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