92 FOREST commissioner's REPORT. 



passing the winter among the terminal shoots of the trees where 

 they remain until the next spring, when the life process is 

 repeated. 



There are no practical ways of protecting forest trees from 

 the attacks of this insect, but in the case of a limited number of 

 small trees around a residence or in parks, the foliage could be 

 protected by spraying with arsenical solution (arsenate of lead, 

 2^ lbs. to 50 gallons of water) about the time of the opening of 

 the buds and the appearance of the new growth in the spring. 



The information acquired by the United States Department 

 of Agriculture through the Bureau of Entomology regarding the 

 seasonal history of this insect indicates that there is no occa- 

 sion for any great alarm as to its continued presence, or any 

 extensive loss of spruce and fir anticipated as a result of its 

 work. The insect has many natural enemies which multiply 

 very rapidly as the Ichneumon and the Braconid flies, which 

 fortunately are quite numerous this year. These may be 

 counted on within a few years to reduce the numbers to a point 

 where the limited amount of damage attracts no attention and 

 does little injury. 



Since, however, one or more years may elapse before these 

 parasitic enemies of the spruce bud-moth gain control, the 

 destruction of some of the spruces and firs is inevitable. 



Nate — Acknowledgement is due to the Maine Experiment Station and 

 the United States Bureau of Entomology for data included in this article. 



