A DANGEROUS TOBACCO DISEASE 

 APPEARS IN THE UNITED STATES 



ERW'IX F. SMITH 



Pathologist in Charge 

 and 



R. E. B. McKENNEY 



Pathologist, Laboratory of Plant Pathology 



UNITED STATES DEPARTMENT OF AGRICULTURE 

 DEPARTMENT CIRCULAR 174 



Contribution from the Bureau of Plant Industry 



(Laboratory of Plant Pathology) 



WM. A. TAYLOR, Chief 



Washington, D. C. 



April, 1921 



WA8HINQT0N : GOVERNMENT PRINTING OFFICE : 1811 



