/1J7. / 



United Stafe^^ 

 Department of 

 Agriculture 



Forest Service 



Intermountain 

 Forest and Range 

 Experiment Station 

 Ogden, UT 84401 



Research Paper 

 lNT-318 



September 1983 



Estimating the Rate 

 and Amount 

 of Tree Loss from 

 IVIountain Pine 

 Beetle Infestations 



Walter E. Cole 

 Mark D. McGrei^r 



Ail 3 



m 

 S 



3 

 Z 



w' 



CO 



o 



I- 



LU 

 LU 



III 



Outbreak-When? 



4 6 

 YEARS 



Amount of Loss 



10 



