412 WEST VIRGINIA EXPERIMENT STATION 



REMEDIES AND PREVENTIVES. 



If as appears to be the case, this insect migrates for long dis- 

 tances in great swarms, there is little that can be accomplished 

 in any single local effort to prevent its ravages or exterminate 

 it. It is one of those problems in battling with insect foes 

 which requires concerted action, not only by the States and 

 Federal Government through their entomologists, but the own- 

 ers of forests in all parts of the country. 



If owners will report to us or some other entomologist the 

 first appearance of groups of dying pine or spruce trees in any 

 locality, and, if the bark of living trees is infested by insects and 

 a piece of bark four or five or more inches square showing the 

 character of the work in the inner bark is sent, something may 

 be accomplished in the way of advice as to what the insect is, 

 and if a destructive outbreak by it is threatened, if it should 

 prove to be the work of the destructive pine bark beetle, the 

 prompt cutting of the timber that is just commencing to die, 

 and the removal of the bark from the trunks may prevent, at a 

 comparatively slight expence, the loss of many thousands of 

 dollars worth of timber and shade trees. If cutting and peeling 

 the timber can not be accomplished it may be, under certain 

 favorable conditions, advisable to introduce some natural 

 enemies of the insect to aid in preventing its rapid spread. 



If in the future an invasion of this insect is threatened, the 

 prompt knowledge of it by the owners of valuable timber, may 

 lead them to make preparations to utilize the timber as fast as 

 it is attacked and thus prevent its loss. 1 



Thus, the information we are able to give in this report from 

 investigation of the past trouble, may be utilized to good advan- 

 tage in the future in preventing serious loss even if it is not pos- 

 sible to check the trouble. 



FUTURE OUTBREAKS LIABLE TO OCCUR. 



In a review of the history of similar troubles to the one describ- 



1. I have been recently informed by the Superintendant of the Cumberland Lumber 

 Company, that the total loss of their dead timber was prevented in this manner. Op- 

 erations were pushed as rapidly as possible in the dying and dead timber, while the liv- 

 ing was allowed to stand. 



