INSECT INJURIES TO FOREST PRODUCTS. 9 



precautions are not taken, and there is evidence that insects are at 

 work in the bark and wood, the damage can be checked by injecting 

 bisulphid of carbon through natural or artificial openings in the 

 affected bark, and immediately stopping these and other openings 

 with putty or a similar substance. 



Poles, posts, piles, ties, mine props, and similar products. — Insect 

 damage to poles, posts, and similar products can be prevented to a 

 greater or less extent by the preservative treatments which have been 

 tested and recommended by the Forest Service for the prevention of 

 decay. These should be applied before the material is utilized for 

 the purposes intended, or, if it be attacked after it has been utilized, 

 further damage can be checked to a certain extent by the use of the 

 same substances. 



It is often of prime importance to prevent injury from wood- 

 boring insects, for the reason that such injuries contribute to more 

 rapid decay. Therefore anything that will prevent insect injury, 

 either before or after the utilization of such products, will contribute 

 to the prevention of premature deterioration and decay. 



Approved : 



James Wn^oN, 



Secretary of Agriculture. 



Washington, D. C, October 7, 1910. 



[Clr. 128] 



o 



