BORING IN THE TRUNK 



235 



of the larva. The adults are 

 clear-winged moths, are on 

 the wing in late summer, 

 and lay eggs on the leaves, 

 whence the larvae make their 

 way to the base of the plant. 

 Removal and destruction 

 of infested canes and roots 

 each spring is the only 

 remedy. 



Fig. 302. — Adult of the Raspberry Root- 

 borer. Slightly enlarged. Original. 



The Round-headed Apple-tree Borer {Saperda Candida Fab.) 



Apple trees, especially newly set stock, are subject to severe injury 

 by a grub that bores in both sapwood and heartwood toward the base 



Fig. 303. — Work and larva of the Round-headed Apple-tree Borer. Original. 



of the trunk. Its work may be recognized by discolorations of the 

 bark and the presence of castings pushed out of its burrows. The 

 full-grown grub is an inch long, yellowish white, with a small, 

 dark head, and a slightly enlarged, brown first segment. 



The parent is a handsome striped beetle. Eggs are laid on the bark, 



