Plant Disease
Medium SeverityAffects: Tomato, Potato, Brinjal · Late Kharif and early Rabi; warm, wet weather (24–29°C) favours spread
Get Disease Alerts for My District →Causal Organism
Alternaria solani (fungus)
Dark brown to black lesions with concentric rings (target-board pattern) on older leaves. Yellow halo around lesions. Severe defoliation reduces fruit/tuber size and yield.
Crop rotation (avoid solanaceous crops for 2–3 years). Remove plant debris after harvest. Use certified disease-free seed. Maintain plant health with balanced nutrition.
Mancozeb (0.25%) or chlorothalonil (0.2%) for preventive sprays. Azoxystrobin or difenoconazole for curative treatment. Spray at 7–10 day intervals during humid weather.
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