(From the Forest Service, United States Department of Agriculture, 



San Francisco Office) 



SAVING FOREST TREES 

 FROM BARK BEETLES 



Timber owners of California are working with the U. S. 

 Forest Service for the extermination of the bark beetles which kill 

 so many of the valuable sugar pine and yellow pine trees where no 

 effort is made to keep them in check* On the Stanislaus National 

 Forest there is an area of about 47,000 acres on which it is estim- 

 ated that the yearly loss from this source is 1100 trees. The tract 

 includes lands owned by two lumber companies, and a portion of the 

 Yosemite National Park. Under the terms of a cooperative agreement 

 two crews of men are now engaged in felling infested trees on this 

 tract and burning the bark which contains the insects. 



Forest Service officials have found that this work can 

 be done only in the winter and early spring and in a normal season 

 must be completed b3/* May 1 since the warm weather causes the insects 

 to emerge from the trees. It is estimated that the amount of timber 

 saved in two years will pay the cost of the work. 



The Forest Service is also cooperating with private 

 timber owners in similar work on the California and the Shasta Na- 

 tional Forests. 



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E-5 



