IH3 
UNITED STATES DEPARTMENT OF AGRICULTURE 
In Cooperation with the 
Kansas and Missouri Agricultural Experiment Stations and 
the Brooklyn Botanic Garden 
DEPARTMENT BULLETIN No. 1284 
Washington, D. C. T •Angust, 1925 
T Let?™ 
1925 
SORGHUM SMUTS AND VARIETAL RESISTANCE 
IN SORGHUMS 
B * 
GEORGE M. REED, Curator of Plant Pathology, Brooklyn Botanic Garden, formerly Pathologist in Charge 
of Cereal-Smut Investigations, Office of Cereal Investigations, Bureau of Plant Industry, and 
LEO E. MELCHERS, Plant Pathologist, Kansas Agricultural Experiment Station, and 
Agent, Office of Cereal Investigations, Bureau of Plant Industry 
CONTENTS 
Page 
Introduction 1 
Smuts Attacking Sorghums 2 
Classification of the Sorghums 12 
Location of the Experiments 12 
Methods Employed in the Varietal Studies 13 
Inoculation Experiments with Covered Kernel Smut 14 
Inoculation Experiments with Head Smut 40 
Experiments with Milo and Feterita with Reference to Their Resistance to Sphaee- 
lotheca sorghi 41 
Germination Studies on Various Sorghums 43 
Influence of External Conditions on Kernel-Smut Infection 44 
Genera 1 Conclusions 49 
Bibliography 51 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1925 
