Question: query regarding plant hopper infestation in rice field. 
Answer: --treatment: spray flubendiamide  2ml/l 3 times at 3 days interval in the morning or evening time in dry weather. and if not use any fertilizer till now than please mix urea 10gm, ssp 10 gm and mop 5 gm per 1 letter of water and spray in the field in evening time. broadcast zinc sulphate 3 kg/bigha.