questions: asking about the control measure against mango hopper infestation in mango . 
 answers: advised him to spray malathion 50 ec @ 2 ml./litre of ater. if infestation remains  after fruiting then spray dimecron @ 1 ml./litre of water. in assam lemon apply urea 50 gm., ssp 150 gm., mop 40-50 gm. per plant during march/april.