Downy mildew

Caused by: Hyaloperonospora parasitica
Problem Category: Fungal Disease
Symptoms: Small angular lesions on upper surface of leaves which enlarge into orange or yellow necrotic patches; white fluffy growth on undersides of leaves
Comments: Disease emergence favored by dry season, moderate temperatures, low humidity and low levels of rainfall
Management: Plant resistant varieties; rotate crops; remove all crop debris after harvest; remove weeds; avoid excessive application of nitrogen fertilizer which encourages powdery mildew growth; powdery mildew can be controled by application of dusts or vapors
Control: spray 2 times 10% Cowdung+Asafoetida solution in 10 days interval.