preventing powdery mildew this year
Powdery mildew is a tough disease to control because it can develop both in wet and dry weather conditions, unlike most other fungal diseases. The first step in controlling it is to plant varieties that are resistant to powdery mildew. You can also spray a broad-spectrum fungicide labeled for food crops at the first sign of the disease. Repeat the sprays at 7 day intervals as long as necessary to keep the disease under control.