GRUBS BORING IN THE CANE 



243 



There are two generations each year. The 

 adult beetles hibernate in cells dug out in the 

 inner bark, often in healthy trees. In the 

 spring they come out, select weakened trees, 

 and bore the main channel just under the bark, 

 laying eggs in the sides of this channel. The 

 grubs work out at right angles, making di- 

 verging burrows. A second lot of beetles ap- 

 pear in August, construct channels as before, 

 and from their grubs come the hibernating 

 adults. 



Control measures are the same as those recommended for the shot 

 hole borer. 



Fig. 317. — The Peach 

 Bark-beetle. Adult. 

 Enlarged and natural 

 size. Original. 



The Currant Borer {^geria tipuliformis Clerck) 



Currants or gooseberries are injured or killed by the work of this 

 borer. The infested plants usually show the attack first by their 

 unthrifty appearance; the next season they 

 fail to leaf out. 



The borer is a yellowish grub, half an inch 

 long when full grown. It works in the center 

 of the cane, spends the winter within the 



Fig. 318. — Adult of the Currant Borer. 

 Enlarged and natural size. Original. 



Fig. 319. — Work of 

 the Currant Borer, 

 Original. 



