4 LEAFLET 2 42, U. S. DEPT. OF AGRICULTURE 



Forest Management the Key to Spruce Budworm Control 



All past studies in eastern Canada and the United States have shown 

 that most serious losses have occurred where there is an abundance of 

 balsam fir, particularly where the trees are overmature, or in over- 

 mature or open-growth stands of jack pine. It is the consensus of opin- 

 ion of entomologists and foresters who have intimate knowledge of the 

 spruce budworm situation that the only practical solution for the 

 region as a whole lies in the application of management practices to 

 bring about forest conditions generally unfavorable to the budworm, 

 thus preventing epidemic outbreaks or lessening their severity. This 

 means particularly reduction in the proportion of balsam fir, especially 

 when overmature. In general, practices desirable from a management 

 standpoint are not favorable to the budworm. 



U.S. GOVERNMENT PRINTING OFFICE: 1944 



