questions: asking about the control measure to control trunk borer pest attack in lemon 
 answers: propylactic smearing of monocrotophos with lime and water (1:1:25) should be applied up to one metre from the base of the tree during march/april which prevents the adult from laying egg. and also the hole should be plugged with cotton/cloths soaked in insecticides like dimecron 5 ml/ litre of water and then plasterd with mud to have an airtight condition.