LABORATORY OUTLINES 
PLANT PATHOLOGY 
BY 
H. H. WHETZEL 
Professor of Plant Pathology 
LEX R. HESLER CHAS. T. GREGORY 
Assistant Professor of Plant Pathology Assistant Professor of Plant Pathology 
W. HOWARD RANKIN 
NEW YORK STATE COLLEGE OF AGRICULTTRE 
AT 
CORNELL UNIVERSITY 
ITHACA, NOX, 
1916 
PUBLISHED BY THE AUTHORS 
