Figure 3.-- 

 Type of 

 helicopter 

 used on the 

 Forest 

 Survey. 





.mm^iJ 



Interior Alaska 



1. Complete aerial photo stand volume tables for spruce and hardwoods. 



2. Begin aerial photography program. 



3. Begin photo interpretation of Interior photography. 



4. Complete cull analysis of commercial tree species. 



5. Complete board-foot volume tables of commercial tree species. 



FOREST INSECTS 



Barkbeetle Losses Decline 



Barkbeetle losses throughout Alaska are at the lowest level in years. 



The Sitka spruce beetle ( Dendroctonus obesus Mann.) confined its 

 activities primarily to the Prince William Sound area and to Port Bazan 

 on Dall Island. The largest outbreak is located in Blackstone Bay near 

 Whittier and involves approximately 2,000 acres. This area has sus- 

 tained considerable Sitka spruce loss during the past four to five years 

 but losses now appear to be subsiding. 



The Alaska spruce beetle ( Dendroctonus borealis Hopk.) has been rela- 

 tively inactive during the past two years. Small group losses occur in 

 white spruce on the Kenai Peninsula, the west side of Cook Inlet, and at 

 a few other scattered locations in the Interior, but these losses can 

 be considered as little more than an endemic condition. 



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