questions: asking about leaf curl in ash gourd. 
 answers: spray rogor 2ml/liter of water 3 times at 5 days interval in the evening time in the absence of rain. after completion of rogor spray neem oil 5ml/liter of water 3 times @ 3 days interval in the evening time. sprays vitamins like -biovita/ mohaphol/ sagorika 2ml /liter of water @15 days interval in the evening time and to be continue up to the season end.