A NATIONAL PLAN FOR AMERICAN FORESTRY 1613 



proximately $92,000 will be needed, for the next 10 years about 

 $62,000 will be needed annually for follow-up work, to prevent rein- 

 festations and to ^ maintain $ controlled conditions. The estimate for 

 porcupine work included in the above total is based on present 

 known conditions in the Rocky Mountain region. Further investiga- 

 tions may reveal additional areas needing treatment. 



The predatory-animal control work of the Biological Survey has 

 an important bearing on use of the forage resources of the national 

 forests. It is not possible to segregate expenditures on the national 

 forests since the control work is carried on also on other lands. 



BUREAU OF PLANT INDUSTRY (DEPARTMENT OF AGRICULTURE) 

 AID IN DISEASE CONTROL 



The control of epidemics of introduced forest diseases through 

 cooperative measures is a necessary function of the Federal Govern- 

 ment. The cooperative control work against the white pine blister 

 rust should be increased promptly in order to prevent excessive losses 

 in valuable stands of white pines, which include three imDortant 

 timber species. 



It is proposed that the general appropriation act be changed to 

 authorize the Division ol Blister Rust Control of the Bureau of Plant 

 Industry to cooperate also in the control of other diseases, bridging 

 the gap between research and application. This would involve ser- 

 vice particularly in connection with the elimination of decayed or 

 disease-susceptible trees in cutting operations ; and with nursery sani- 

 tation and the selection of healthy sites and species combinations for 

 plantations. Much of the recommended expansion of duties can be 

 cared for by utilizing the present forces of the Division with relatively 

 little increase in personnel. 



It is estimated that in order to handle this work adequately the 

 present annual expenditure of $344,500 will require increase at once 

 to $554,000 and progressively to $719,000 by 1939. After 1939 the 

 expenditures for maintaining the blister rust portion of this protec- 

 tion should materially decrease if the indicated program is carried 

 out. 



RESEARCH IN DISEASES OF FORESTS AND FOREST PRODUCTS 



The need for information on control of forest tree diseases and 

 diseases of forest products requires continued forest pathology 

 investigations. The current (1933) appropriation of $120,000 is 

 insufficient for adequate research upon the great number and variety 

 of problems with which the various owners of forest land are faced. 

 Appropriations are needed up to the $250,000 authorized by the 

 McSweeney-McNary Act. 



For investigation on newly introduced diseases in forests, which are 

 not covered by the act, the present funds of approximately $24,000 

 need an early increase if the Dutch elm disease and the new beech 

 bark disease are to be adequately attacked. The seriousness of the 

 beech disease is only now being recognized, and the possibilities for 

 control cannot be determined until further study of the situation is 

 made. 



