1. Yellow, angular spots restricted by veins resembling mosaic mottling appear on upper surface of leaves
2. The corresponding lower surface of these spots shows a purplish downy growth in moist weather
3. The spots turn necrotic with age
4. The diseased leaves become yellow and fall down
5. Diseased plants get stunted and die
6. Fruits produced may not mature and have a poor taste

1. Destruction of cucurbitaceous weeds around field
2. Spray Metalaxyl + Mancozeb (Ridomil) 0.2% or Copper oxychloride 0.3%

1. Whitish or dirty grey, powdery growth on foliage, stems and young growing parts
2. The superficial growth ultimately covers the entire leaf area
3.The diseased areas turn brown and dry leading to premature defoliation and death
4. Fruits remain underdeveloped and are deformed

1. Field sanitation
2. Removal and destruction of collateral weed hosts from the vicinity of the field
3. Spray Tridemorph 0.1% or Dinocap 0.2%