CONTENTS 



PAGE 



Symptoms of the disease 1004 



On the roots and other underground parts 1004 



On the plant above ground 1005 



Symptoms of other root diseases of the bean 1006 



Black root-rot 1006 



Rhizoctonia blotch 1007 



Etiology 1007 



Morphology 1007 



Cultural characters 1008 



Nomenclature 1010 



Life history 1012 



Pathogenicity 1017 



Inoculation experiments with the bean plant 1017 



Cross-inoculations 1019 



Effect of weather conditions 1019 



Effect of dry root-rot on the yield of the bean crop 1022 



Control 1027 



Rotation of crops 1027 



Soil treatment 1028 



Use of beans resistant to root-rot 1030 



Literature cited 1032 



>m 



