- Leaves develop target like purple to brown spots with many concentric rings and white margins
- Leaf spots become covered with a brownish-black powdery growth in wet weather
- When severe, leaves will turn yellow and wilt from the leaf spot to the leaf tip
- Commonly infects leaves damaged by other pathogens, insects or abiotic problems like hail or sunscald
- Older leaves are often more severely infected than younger leaves
- More information on Purple Blotch ...