U.S. Forest Service 

 Research Paper INT -7 

 1963 



EFFECTS OF BROOM RUSTS ON SPRUCE AND FIR 



By 



Roger S. Peterson 

 Division of Forest Disease and Timber Management Research 



INTERMOUNTAIN FOREST AND RANGE EXPERIMENT STATION 



Forest Service 

 U.S. Department of Agriculture 

 Ogden, Utah 

 Joseph F. Pechanec, Director 



