INSECTS AFFECTING THE RASPBERRY AND 

 BLACKBERRY. 



INJURING THE ROOTS. 



The Raspberry Root-borer. 



Aegeria rubi. 

 The stems of raspberries and blackberries are 

 sometimes injured by a whitish caterpillar with six- 

 teen legs, that bores the root and base of the stem. 

 This is the Raspberry Root-borer, and the caterpillar 

 hatches from an egg deposited by a clear-winged 

 moth upon the cane, a few inches above the soil sur- 

 face. The larva, after hatching, eats into the center 



of the s t a 1 k, 

 w here it de- 

 vours the pith, 

 working down- 

 ward toward the 

 root. It spends 



Fig. 46. Squash Vine-borer: larva and moth. . . 



the winter in the 

 root, feeding upon its substance, and in spring works 

 upward again, generally in another cane than the 

 one in which it descended. A few inches above the 

 ground it gnaws almost through the stem-wall, leav- 

 ing the thin outer membrane intact. It then pu- 

 pates inside the cane, near the partial opening. A 

 short time later the pupa wriggles through the hole, 

 bursting the outer membrane, and stops when about 



