REPORT OF THE CHIEF OF THE BUREAU OF PLANT 



INDUSTRY. 



United States Department of Agriculture, 



Bureau of Plant Industrt, 

 Washington, D. C, September 22, 1919. 

 Sir : I have the honor to submit herewith a report of the work of 

 the Bureau of Plant Industry for the fiscal year ended June 30, 1919. 

 Respectfully, 



Wm. a. Taylor, 



Chief of Bureau, 

 Hon. D. F. Houston, 



Secretary of Agriculture, 



WORK AND ORGANIZATION OF THE BUREAU. 



The Bureau of Plant Industry undertakes the study and economic 

 solution of plant problems, especially in relation to crop production 

 and utilization. These activities include the improvement of useful 

 plants by breeding and cultural methods, the investigation of destruc- 

 tive plant diseases and the development of methods for their control, 

 the introduction and acclimatization of new plants from other parts 

 of the world, the extension of the use of valuable crops and the devel- 

 opment of improved methods for their utilization, the determination 

 of both agronomic and economic crop relationships, and the meeting 

 of emergencies incident to crop production as they arise from time to 

 time throughout the country. 



The work of the bureau during the year has been carried on with 

 the following organization : 



Laboratory of Plant Pathology Erwin F. Smith, Pathologist in Charge. 



Pathological Collections Flora W. Patterson, Mycologist in 



Charge. 



Fruit-Disease Investigations M. B. Waite, Pathologist in Charge. 



Investigations in Forest Pathology Haven Metcalf, Pathologist in Charge. 



Citrus-Cf^nker Eradication Directed by K. F. Kellennan, Associate 



Chief of Bureau. 

 Blister-Rust Control .S. B. Detwiler, Forest Pathologist in 



Charge. 

 Cotton, Truck, and Forage Crop Dis- 

 ease Investigations W. A. Orton, Pathologist in Charge. 



Crop Physiology and Breeding Investi- 

 gations W. T. Swingle, Physiologist in Charge, 



Soil Bacteriology and Plant-Nutrition 

 Investigations Directed by K. F. Kellerman, Associate 



Chief of Bureau. 

 Soil-Fertility Investigations Oswald Schreiner, Biochemist in 



Charge. 

 Acclimatization and Adaptation of Crop 



Plants; Cotton Breeding O. F. Cook, Bionomist in Charge. 



P^ber-Plant Investigations L. H. Dewey, Botanist in Charge. 



151352" 20 10 137 



