GRUBS OR MAGGOTS IN CANE OR STEM 



245 



The Raspberry Cane-borer (Oberea himaculata 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 antennae 

 and yellow thorax. The grub, 

 when full grown, is one inch long 



Fig. 323 —Adult of the Rasp- 

 berry Cane-borer. Slightly en- 

 larged. Original. 



Fig. 



324. — Work of the Raspberry 

 Cane-borer. 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 {Phorhia ruhivora 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- 



