COTTON 167 



In general the diseases affecting cotton may be 

 divided into three classes : 



1. Diseases affecting bolls: 



Anthracnose 

 Shedding bolls. 



2. Diseases affecting roots: 



Root Gall 

 Root Rot. 



3. Diseases affecting leaves or stems or both: 



Anthracnose 



Leaf Blight 



Mildew 



Damping-off 



Wilt 



Mosaic 



Red Rust 



Angular Leaf Spot. 



WHAT THESE DISEASES DO 



In order to clearly understand these diseases 

 each one will be discussed separately. 



Anthracnose: The fungus causing this dis- 

 ease is a well known parasite of the cotton plant 

 in all its stages of growth. It attacks the stems 

 of young seedlings near the ground and produces 

 the disease similar to the well known "sore-shin" 

 or damping-off of the same plant. The cotyle- 

 dons or young seed leaves also are attacked 

 frequently. The same fungus also produces spots 

 on the leaves and on the stems, but it is perhaps 

 best known as the cause of the anthracnose of the 

 boll. 



When it attacks the bark of the stem, reddish- 



