questions: query regarding leaf miner in ridge gourd. 
 answers: spray chlorpyriphos or rogor @ 2 ml/liter of water 3 times at 5 days interval in absence of rain. after completion of above spray please spray one vitamins like- mohaphol/sagorika/biovita 2 ml/liter of water at 15 days interval continously up to the end of the season.