PORTO RICO AGRICULTURAL EXPERIMENT STATION, 
D. W. MAY, Agronomist in Charge, 
Mayaguez, P. R. 
BULLETIN No. 28. 
Under the supervision of the STATES RELATIONS SERVICE, 
Office of Experiment Stations, U. S. Department of Agriculture. 
THE COFFEE LEAF SPOT 
(Stilbella flavida) 
IN PORTO RICO 
BY 
T. B. McCLELLAND, Horticulturist. 
Issued December 14, 1921. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1921. 
