GRUBS OR MAGGOTS IN CANE OR STEM 245 
The Raspberry Cane-borer (Oberea bimaculata Oliv.) 
Raspberry or blackberry shoots attacked by this insect wilt toward 
the end, and often bend sharply over. Within will be found a slender 
grub, which later bores down 
through the cane, pupates in 
the base of it, and emerges the 
following June as a slender, 
dark beetle, with long antenne 
and yellow thorax. The grub, 
when full grown, is one inch long 
Fie. 323. —Adult of the Rasp- Fig. 324.— Work of the Raspberry 
berry Cane-borer. Slightly en- Cane-borer. Original. 
larged. Original. 
and has a small brown head. Two years are required for the entire 
life round. If a cane that has wilted is examined closely, it will 
be found that the beetle has girdled it at two points with a row of 
punctures. The egg is laid between these two rows. 
Remove and destroy the upper parts of infested canes as soon as the 
presence of the insect is discovered. If this work is delayed until late 
summer, it is necessary to remove the entire cane in order to get the 
grub. 
The Raspberry Cane-maggot (Phorbia rubivora Coq.) 
The tips of the young shoots wilt and droop as when attacked by the 
cane-borer described above, but the canes do not show the character- 
