United States 

 Department of 

 Agriculture 



Forest Service 



Intermountain 

 Research Station 



Research Paper 

 INT-36 7 



June 1986 



Mountain Pine Beetle 

 in Ponderosa Pine: 

 Effects of Phloem 

 Thickness and Egg 

 Gallery Density 



Gene D. Amman 

 Judith E. Pasek 



C-- 



