

U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF PLANT INDUSTRY BULLETIN NO. 149. 



B. T. GALLOWAY, Chief < if 



DISEASES OF DECIDUOUS FOREST 



TREES. 



BY 



HERMANN VOX SCHREXK, 



FORMERLY EXPERT ix CHARGE OF THE MISSISSIPPI VALLEY 

 LABORATORY OF THE BUREAU OF PLANT INDUSTRY, 



AND 



PERLEY SPAULDING, 



PATHOLOGIST. INVESTIGATIONS ix FOREST PATHOLOGY. 



ISSUED JUNE 30, 1909. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1909. 



