UNITED STATES DEPARTMENT OF AGRICULTURE 



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BULLETIN No. 658 



Contribution from the Bureau of Plant Industry 

 WM. A. TAYLOR, Chief 



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Washington, D. C. 



PROFESSIONAL PAPER 



June 12, 1918 



FOREST DISEASE SURVEYS. 



By James R. "Weir, Forest Pathologist, and Ernest E. Hubert, Scientific Assist- 

 ant, Office of Investigations in Forest Pathology, Bureau of Plant Industry, 

 Missoula, Mont. 



Introduction 



Object of forest disease surveys. 

 Disease-survey methods _ . 



CONTENTS. 



Page. 



1 



2 



13 



Pathological maps. 

 Summary 



Page. 

 19 

 23 



INTRODUCTION. 



The National Forests are administered with the expectation of 

 their becoming self-supporting through the medium of returns from 

 such activities as timber sales, grazing, and special-use privileges. 

 Of these operations, that of the sale of timber is, in the National 

 Forests of the northwestern United States, unquestionably of the 

 greatest importance in respect to paying the expense of administer- 

 ing the forest. In district No. 1 in the year 1916 the total receipts 

 from timber sales equaled $439,880 and grazing $50,836. These figures 

 show the relation between the two incomes derived from the princi- 

 pal forest activities of this district. Some few of the forests have al- 

 ready attained a position of self-support. One forest in particular 

 is reported to have outdone all expectations and in so doing has aided 

 in the administration of forests whose incomes have been less than 

 their expenses. In such self-supporting forests it is always found 

 that a ready market and available timber supply have resulted in a 

 maximum of timber sales. It is, then, a foregone conclusion that 

 timber sales in the National Forests of the Northwest are the main- 

 stay of a self-supporting policy and that all data of value to timber- 

 sale operations are bound to be of value in their successful super- 

 vision. The data and recommendations included in this paper are 

 based on conditions prevalent in district No. 1 of the United States 

 Forest Service. 



39732°— Bull. 658—18- 



