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. 
Fic. 317.— The Peach 
Bark-beetle. Adult. 
Enlarged and natural 
size. Original. 
Control measures are the same as those recommended for the shot 
hole borer. 
The Currant Borer (Ageria 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 
Fic. 318.— Adult of the Currant Borer. 
Enlarged and natural size. Original. 
Fic. 319. — Work of 
the Currant Borer. 
Original. 
