Alternaria leaf spot

Caused by: Alternaria alternata
Problem Category: Fungal Disease
Symptoms: Small irregular brown lesions on leaves which expand and turn gray-brown or dark brown with concentric zones; older areas of lesions may dry out and drop from leaves causing shot hole; lesions coalesce to form large necrotic patches
Comments: Disease emergence favored by high humidity and warm temperatures; plants grown in nitrogen and potassium deficient soils are more susceptible
Management: Plant beans in fertile soil; foliar fungicide application may be required
Control: spray 2 times Cowdung+Asafoetida solution in 10 days interval.