SOME DISEASES OF BEANS 



General Discussion 



Three diseases occur commonly on beans in the State of New York. 

 Named in the order of their abundance and destructiveness, they are : 

 Anthracnose, or " Pod-Spot ;" Bhght, a bacterial disease ; Rust. These 

 diseases are commonly confused by growers. The term " rust " is in many 



Fig. ioo. — Anihracnosc or " Pod-Spot " of bean. 



localities applied to the anthracnose or " pod-spot," probably from the 

 fact that the diseased spots are often of a rusty brown color. In other 

 sections the word " blight " is used to indicate any disease of beans. This 

 confusion of names is very unfortunate, snice it leads to the common con- 

 ception that these troubles are due to the same cause. The three diseases 

 named above are each caused by distinctly different parasitic plants. The 

 life history of these parasites, — i. e., their method of reproduction, of 



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