Early Blight of Potato
Alternaria solani
Potatofungal
A common fungal disease producing dark, concentric "target spot" lesions on foliage and tubers.
Symptoms
Dark, concentric-ringed "target" spots on older leaves, plus lesions on tubers.
Favorable conditions
- •Warm temperatures with alternating wet and dry periods
- •Plant stress from nutrient deficiency
Management
- 1Rotate fungicides on a protectant schedule
- 2Plant resistant varieties
- 3Rotate crops
- 4Maintain balanced fertility
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