questions: query related to blight of pumpkin. 
 answers: pluck the excessively affected leaves from the plants and burn them in a separate place out from the field. spray copper oxychloride (blitox-50/ blue copper) 3 gram per liter of water 3 times at 5 days interval in the evening time in the absence of rain. if the insect is in control now that you can use neem oil 5ml/liter of water at 5 days interval. after 3 spray of copper oxychloride spray planofix 1 ml/5l of water 2 times at 15 days interval in the absence of rain.