Alternaria Blotch of Apple

Symptoms

Brown-to-black necrotic blotches on leaves of susceptible cultivars, leading to early leaf drop in severe cases.

Favorable conditions

• •Warm, wet weather
• •Highly susceptible cultivars planted without resistant alternatives

Management

1. 1Apply fungicide sprays during the growing season
2. 2Plant resistant varieties
3. 3Remove fallen leaves to reduce overwintering inoculum