3 2 Gardening 



R. F. Poole. N. J. Expt. Sta. 



FIG. 170. Bean pods infected with bean anthracnose. The diseased portions 

 often extend through the walls of the pod and affect the seed within. 



ings produced. These somewhat rounded but irregularly 

 shaped enlargements may appear on leaves, stalk, tassel, 

 or ears. At first, the outside of these swellings is glis- 

 tening white, but later the mass breaks up into black 

 powdery substances, largely composed of minute spores. 

 These spores live over winter and lead to the infection of 

 growing plants the next year. The filaments of the fun- 

 gus gain entrance anywhere in the growing parts, espe- 

 cially through wounds. The fungus grows rapidly, and 

 the parts in which it feeds become enlarged and greatly 

 distorted. The effect of this fungus differs very much 

 from that of such a fungus as the downy mildew of the. 

 cucumber, which kills tissues and does not first cause 

 them to become enlarged. 



To prevent the spread of this smut, do not allow any 

 pustules to mature and shed their spores. Cut out the 



