22 



infested bark and surface of the wood will effectually destroy the 

 insects. In addition, the logs so treated will be protected next spring 

 and summer from the attack of wood^boring insects, and thus be 

 almost or quite as valuable for all commercial purposes as if cut 

 from living trees. 



It is not necessary that all infested trees in. the reserve or those of all 

 other infested areas should be thus cut and barked, but it is important 

 that a large per cent should be so treated in order to insure a sufficient 

 reduction of the beetles to check their destructive ravages. 



SUGGESTIONS FOR PREVENTING FURTHER TROUBLE. 



It is believed that the prevention of further trouble may be effected 

 by means of girdled and otherwise treated trap trees, but the best 

 method of treating the trees and the proper time or periods to do the 

 work remain to be determined. 



No experiments of this kind have been conducted with the rock pine, 

 and it is not positively known when the beetles commence to fly or what 

 is the period of their greatest abundance or swarms. Therefore it is 

 suggested that a special line of experiments be conducted, between the 

 1st of May and the 1st of September, to determine the best methods 

 of providing trap trees and the best time to do the work to secure the 

 desired end, viz, that of attracting the migrating beetles to certain 

 trees or sections of the forest, where they can be subsequently 

 destroyed by cutting the trees and removing the bark. 



TO PREVENT LOSSES FROM WOOD-BORING INSECTS AND WOOD-DESTROYING FUNGI. 



The evidence found relating to the work of wood-boring insects and 

 wood-destroying fungi, which cooperate in effecting a rapid deteriora- 

 tion of the trees killed by beetles, suggests that all trees should be cut 

 within three or four years after they commence to die, the sooner the 

 better, and be worked up into lumber, ties, mine timbers, and cord 

 wood, in order to prevent the great loss of valuable products which 

 would otherwise follow. Such material, if in excess of the demand 

 for immediate consumption, might be stored where it would keep dry 

 and be protected from fire. It would thus remain sound for many 

 years and serve to supply the demand for material which would 

 otherwise have to be drawn from the living timber. 



THE PROTECTION OF LIVING TIMBER. 



Since it is of the greatest importance that the living timber in the 

 reserve should be protected and preserved for the heavy demands 

 upon its resources which, owing to the vast mining, commercial, and 

 other interests, it will be required to meet, the prevention of unneces- 

 sary cutting on account of injuries, or alleged injuries, from insects 

 should receive special attention. 



