100 



Life-History. The moths lay their eggs singly on stems 

 and branches late in June or July, and the caterpillar on hatch- 

 ing gnaws at first irregularly below the bark. After wintering, 

 the caterpillar bores into the wood, arid the gallery or tunnel, 

 running in the long axis of the infested stem, is round and 

 regular and may reach 8 inches in length. The life cycle is 

 said to be either two or three years. The caterpillars have 

 been known to leave their first feeding place and attack 

 younger and fresher growths. 



Methods of Control. (1) When the trunk of a tree is 

 badly attacked it should be cut down and burnt. Branches 

 which are dying should be cut back until the end of the burrow 

 is reached. If the larva has not been found during this process 

 the cut portions must be split and the larva killed. 



(2) In the case of branches and stems which are slightly 

 attacked or which it is desired to save, a pointed wire may 

 be pushed down the burrows to kill the larva, or the methods 

 suggested against the goat moth, Section (2), may be employed. 

 The fumes of burning sulphur or tobacco forced into the holes 

 by means of a pair of bee bellows have also been found 

 effective. 



