Issued March 7, 1910. 



U. S; DEPARTMENT Ol- AGRICULTURE, 



BUREAU OF PLANT INDUSTRY— Circular No. 52. 



B. T. GALLOWAY, Chief of Bureau. 



WART DISEASE OF THE POTATO; 



A DANGEROUS EUROI^EAN DISEASE LIABLE TO BE 

 INTRODUCED INTO THE UNITED STATES. 



LIBRARY 

 NEW YORK 

 SY BOTANICAL 



W. A. ORTON, Pathologist, 



AND 



ETHEL C. FIELD, Scientific Assistant, 



Cotton and Truck Diseases and Sugak-Plant 



Investigations. 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 1910 



26143—10 



