Symptoms and control measures of early blight in potato crops

Symptoms of early blight appear on the stem, leaves and potato tubers.
Initial symptoms appear as small 1-2 mm black or brown lesions on leaves.
The lesions become larger under favourable environmental conditions. Lesions more significant than 10 mm in diameter often have deep rings. As the lesions progress, entire leaves become chlorotic.
Lesions on stems are often sunken. This may result in the death of the plant.
Severely infected leaves turn yellow and drop. Infected tubers show brown, corky dry rot.

For the control of this disease, Spray NovaCrust (Azoxystrobin 11% + Tebuconazole 18.3% SC) @ 300 ml or Carmanova (Carbendazim 12% + Mancozeb 63% WP) @ 700 gm + Novamaxx (Gibberellic Acid 0.001 % L) 300 ml + Silicomaxx gold 50ml per acre @ 150 to 200 litres of water.