Northern Leaf Blight
A fungal disease of corn caused by Exserohilum turcicum.
Affected Plant
Corn (maize)
Severity
Moderate to High
Symptoms
- Long, elliptical, gray-green to tan lesions on leaves
- Lesions may merge, leading to significant leaf area loss
Causes
- Fungal spores surviving in corn residue
- Moderate temperatures and high humidity favoring spread
Prevention
- Choose resistant hybrids where available
- Rotate crops
- Manage crop residue
Management
- Apply fungicide where warranted per local extension guidance
Related Corn (maize) Diseases
Think your plant might have Northern Leaf Blight?
Upload a photo of the affected leaf and get an instant AI diagnosis with a Grad-CAM explanation of what the model saw.
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.