622 Report of Entomologists op the 



The injury which the insect causes is more conspicuous than the 

 insect itself ; the twisted and distorted ends of the canes bear a cluster 

 of curled leaves, which in summer are of a deeper green than the 

 uninjured leaves and remain attached all winter. New canes, when 

 attacked by a colony of the larvae, only make an average growth of 

 from 12 to 18 inches in height. In many cases the adults injure a 

 cane but do not establish a colony. In the latter case the cane con- 

 tinues to grow, but has a twisted crook near the base. They often 

 attack the branches of the old canes, in which case their injury is not 

 so marked as it is usually distributed over a larger number of 

 branches. 



Remedies. — The only remedy that has been recommended is the 

 gathering of the curled leaves, or cutting off the ends of the canes, 

 and burning them. It is also recommended that this should be done 

 early in the morning, or late in the evening, and that the leaves or 

 the severed canes be placed within sacks as gathered. This un- 

 doubtedly is the most practical remedy that can be used, providing 

 this cutting of the infected canes is done at the right season of the 

 year. The latter, which is the most essential point, is not given in 

 any of the recommendations, probably from the fact that all the 

 habits of the insect were not known. From the few scattered facts 

 obtained the past year it is evident, that, if the cutting out of the 

 infested canes is done as soon as the leaves show signs of curling, 

 say in June, only about one-half of the adults will be destroyed. 

 They are quite active at this season and are able to fly ; furthermore 

 they are not confined to the curled leaves. 



If pruned too early a second pruning will be necessary and con- 

 sequently more of the young canes spoiled. If the pruning is left 

 until the month of August, at which time the adult insects are all 

 through depositing eggs, probably dead, and the larvae are confined 

 to the curled leaves and ends of the canes, one pruning will be suf- 

 ficient. 



If the pruning is done in August no such precautionary measures 

 as has been recommended with regard to placing in sack and burn- 

 ing will be needed, for the larvse are unable to travel far. By 

 «imply cutting out the infested canes and piling them on an open, 

 or i)lowed piece of ground the larvae will all perish by the simple 

 drying of the leaves. 



