A COMPARISON OF 

 RADIOGRAPHIC AND 

 BARK-REMOVAL 

 METHODS FOR 

 SAMPLING OF 

 MOUNTAIN PINE BEETLE 

 POPULATIONS 



Gene D. Amman and 

 Lynn A. Rasmussen 



fern '""A 



USDA Forest Service 

 Research Paper ll\IT-151, 1974 



INTERMOUNTAIN FOREST & 

 RANGE EXPERIMENT STATION 

 Ogden, Utah 84401 



