Early Blight
A fungal disease of potato caused by Alternaria solani.
Affected Plant
Potato
Severity
Moderate
Symptoms
- Dark brown spots with concentric "target" rings, usually on older leaves first
- Yellowing of tissue around spots
- Leaves may die and drop prematurely
Causes
- Fungal spores overwintering in soil and plant debris
- Warm, humid weather and plant stress favoring infection
Prevention
- Rotate crops away from potatoes and other solanaceous plants
- Remove and dispose of infected plant debris
- Space plants for good airflow
- Maintain balanced fertilization
Management
- Apply fungicide per local extension guidance
- Avoid overhead watering
Related Potato Diseases
Think your plant might have Early Blight?
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Diagnose Your PlantDisclaimer: This is an AI-generated result and not a replacement for expert agronomic or plant-pathology diagnosis. Confidence scores reflect the model's certainty, not biological ground truth. The model was trained and evaluated on leaf photos captured under controlled, lab-like conditions, so accuracy on real-world field photos (cluttered backgrounds, variable lighting, multiple or overlapping leaves) may be lower than the reported evaluation metrics.