Question: asking about control measure of nut spliting in coconut. 
Answer: apply recommented doses of fertilizer  urea- 1200 gram ssp 1kg, mop 1kg , borax 50 gram along with 10 -15 kg of dry cow dug in two equal split dose ance in septenber-october and another in the month of march -april in ring method 1.5 meter away from the plant. and spray decis 2ml/liter of water 3 times at 15 days interval in the leaves and fruit bearing portion.