- Initially pale yellow spots develop on the oldest leaves
- White to gray powdery felt in spots, blotches or complete covering of leaves
- Lesions develop on underside of leaves, or on shaded leaves first
- Older leaves infected first
- Severe infection can cause leaves and vines to wither and die
- Fruit may be blotchy or have sunscald
- More information on Powdery Mildew...