Alternaria Leaf Spot? (Target Spot)
Alternaria is fungal disease causing brown spots with concentric rings (target pattern) on leaves. Spreads in warm humid conditions.
Alternaria leaf spot? Brown spots with rings—see causes and analyze fast.
Common Causes
- High humidity
- Poor air circulation
- Overhead watering wetting leaves
- Infected plant debris
How to Tell Which One You Have
Brown/tan spots with dark concentric rings, yellowing around spots, lower leaves first, spots may merge.
FAQ
Treat it?
Remove affected leaves, copper fungicide, neem oil. Improve airflow and reduce humidity.
Serious?
Moderate. Won't kill plant but reduces photosynthesis and can spread.
Prevent?
Good airflow, avoid wetting leaves, remove debris, rotate crops, resistant strains.