INSECTS INJURIOUS TO THE GRAPE 



449 



The Grape Cane-borer * 

 During the spring young grape shoots sometimes suddenly 



X 



break off or droop and die, and 

 if examined a small hole will 

 be found just above the base 

 of the withered shoot, with a 

 burrow leading from it into 

 the main stem. In this bur- 

 row will be found a small 

 brown beetle, a half inch long 

 (Fig. 378a), which is the cause 

 of the injury. It has been 

 sometimes called the apple 

 twig-borer on account of the 

 similar injury which it does to 

 apple twigs, and it also 

 attacks pear, peach, plum, 

 forest and shade trees and 



___ ornamental shrubs, but it is 



FIG. 377. Work of the grapecane girdler. (After Brooks.) 



* Amphicerus bicaudatus Say. Family Ptinidce. See C. L. Marlatt, 

 Farmers' Bulletin 70, II. S. Dept. Agr. 



