Question: asking about the control of leaf blight in coconut
Answer: told him to apply bordeux mixture 
1.prepartion of bordeux mixture - 100gm lime in 5 l of  water  in one container , 100gm caso4(tutiya) in 5 l of water in anothe container mix them well and pour it in another container and spray  3 times at 45 days interval 
2.spray contaf @ 2ml / l of water in root 3 times in 3 months atleast 1 spray in 1 month