Question: query regarding  hopper burn in rice field. 
Answer: --treatment: please spray flubendiamide 1ml/l or thiamithoxam 3g/10 l of water or tricel 2ml/l of water 3 times at 3 days interval in the evening time in the absence of rainfall. use foliar spray of multifeed 4g/l of water 3 times once in a week in the evening time in the absence of rainfall.