REPORT OF THE STATE ENTOMOLOGIST I912 69 



wholly or in part the past summer, because it is these trees which 

 contain living grubs. General cooperation over an extended area, 

 in the cutting out of infested trees and burning of the bark as 

 outlined above, will do much to check this deadly enemy of hick- 

 ories. It is a method which has been tried m some sections with 

 marked success and is more practical on large holdings than 

 where the cooperation of numerous owners must be secured. This 

 destruction of the insects does not prevent the utilization of the 

 wood and timber commercially, provided the bark is destroyed 

 within the above given time limits. Slabs from sawlogs and fire- 

 wood with the bark on should all 1)e burned during the winter. 

 If it is impractical to work up the logs and burn the slabwood, 

 the borers can be destroyed by a prolonged submergence in water 

 or by removing only the bark and burning that. 



The possibility of protecting trees which have been entered the 

 past season, is discussed under experimental work. Such treatment 

 can never be advised for ordinary woodland conditions. 



