Description:

• This disease occurs mostly in high humidity and cool temperatures. It spreads via water splashes, rain, and infected debris.

Damage Symptoms:

• Yellow and angular spots appear on the upper surface of the leaves of infected plants. Later, these spots become necrotic.
• The lower surface of these spots shows a purplish downy growth in moist weather.
• The diseased leaves become yellow, curl, wither, and fall.
• Diseased plants become stunted and may die.
• Fruits may not mature and have a poor taste.

Preventive Measures:

• Remove cucurbitaceous weeds around the field.
• Grow disease-resistant varieties.

Control Measures:

• Spray Metalaxyl at 0.2% or Chlorothalonil at 0.2%.
• Spray Zineb at 0.3% at 10-day intervals.