questions: asking about the control measure of trunk borer pest attack in lemon tree. 
 answers: suggested that 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.