treatment for powdery mildew
By Grapes
United Kingdom 
how do I treat powdery mildew on black hamburg grapes
On plant
botrytis cinerea
6 Aug, 2008
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Previous question
« Could you get into your gardens pored here all day and still is.
If you are sure it is mildew and not botrytis then it is a very serious problem. A suitable systemic fungicide is needed.
6 Aug, 2008