276 



INSECTS AFFECTING SHADE TREES 



from the root to leaf, and a tree thus girdled dies. The burrows 



may occur anywhere from the base of the tree to the smaller limbs. 



The beetles (Fig. 281) are found flying in spring and early 



FIG. 280. Young locust tree injured by locust borer and later broken by the wind. (After 

 Houser, Ohio Bull., 194.) 



summer, at which time eggs are laid on the bark. One year is 

 necessary for the life cycle. 



Control. Chapman advises the cutting and burning of in- 

 fested trees before the emergence of the adults in the spring. This 



