Vegetable and Field Crops 



155 



It is reported upon many species of true beans (Phaseolus) 

 and upon related genera as Vigna, Falcata, Strophostyles. 

 Where the disease proves destructive, the use of resistant 



31 



Fig. 82. 



Bean rust upon leaf and pods; note the numerous sori upon 

 both surfaces. After Beach. 



varieties, clean culture, and the destruction of all wintering 

 forms, is advisable. 



Blight ^^^ {Pseudomonas phaseoli EFS.). — Beans of va- 

 rious kinds are subject to a blight which manifests itself 

 upon the pod, leaf, or stem. It has been reported from 

 various states, from Canada, is widely distributed, and 



