Disease on crop
fungalEarly Blight on potato
Alternaria solani
Fungal disease starting on lower leaves and progressing upward. The most common tomato and potato leaf disease in the eastern US.
- Disease
- Early Blight
- Pathogen type
- Fungal
- Crop
- Potato
- Scientific name
- Alternaria solani
Early Blight on potato
Detailed guidance for this section is being prepared. Check back soon.
Symptoms on potato
- ▸ Concentric-ring brown spots ('target' pattern) on lower leaves
- ▸ Yellowing and dropping of lower foliage
- ▸ Stem lesions and dark sunken areas on fruit at the stem end
IPM controls
- ✓ Mulch to prevent soil splash onto lower leaves
- ✓ Stake or cage plants for airflow
- ✓ Crop rotation away from Solanaceae beds for 3 years
- ✓ Remove and destroy infected lower foliage
- ✓ Resistant varieties (Mountain Magic, Defiant, Iron Lady)
- ✓ Copper or chlorothalonil sprays for high-pressure conditions
Other crops affected by early blight
Related