246 



PESTS OF OUCHARD AND SMALL FRUITS 



istic punctures and do not bend sharply at one place. The drooping 

 is due to the presence of a maggot wliich burrows in the pith of the 

 cane and more or less girdles it from the inside. 



The adult is a two-winged fly, and emerges in the spring. The insect 

 remains as a pupa within the cane over winter. Cut and destroy 

 infested canes as soon as the wilting of the tips is observed. 



The Currant Stem-girdler (Janus integer Nort.) 



Currant shoots wilt and bend over sharply, and usually the tip 

 soon breaks off and falls to the ground, leaving a square-cut stub. 

 Within the remaining stalk, a few inches below the cut, will be found 

 a light yellow larva half an inch long, wider toward the head, and pro- 

 vided with a forked spine at the hind end. 



The parent insect is a sawfly. The girdling of the stem is done by 

 the adult just after depositing its egg in the 

 shoot and at a point just above the egg. The 

 larva hibernates in the main shoot. It seldom 

 burrows more than six inches below the stub. 



Infested shoots should be cut off eight or ten 

 inches below the stub. 



The Grape-cane Gall-maker 



(Ampeloglypter sesostris Lee.) 



A tiny snout beetle, one eighth of an inch 

 long, sometimes injures grape canes in the 



Fig. 325. — Work of 

 the Grape-cane Gall- 

 maker. Original. 



Fig. 326. — Adult of the Grape-cane Gall-maker. 

 Enlarged and natural size. Original. 



