COTTON 



107 



Older plants frequently suffer from the " sore shin " 

 disease, which may be due to the same organism as the 

 "damping off" or "sore shin" referred to above. 

 However, the plants being older are also stronger and 

 better able to resist the organisms of disease. 



When these diseases become troublesome, the crops 





FIG. 48. Cotton plant affected with wilt. (Photo by H. R. Fulton.) 



should be rotated. Liming has been recommended for 

 acid soils. 



Cotton Wilt ; Frenching ; Blackheart ; Blackrot. 



This disease should be known as the wilt (Fig. 48), 

 since it is very similar in its general characters to the 

 wilt diseases which occur on many other plants. It is 

 one of the most severe and widespread diseases of the 

 cotton. 



