98 KNAPP METHOD OF GROWING COTTON 



belt. No variety of cotton is entirely free 

 from this disease, but some varieties are more 

 subject to it than others. 



This disease first appears on the bolls as 

 very small, dark spots, which enlarge and 

 become somewhat sunken in the centres, 

 which are pink or reddish brown. 



The disease is spread by spores formed on the 

 diseased areas and is carried over winter in 

 infected seed and possibly in old cotton plants. 

 Anthracnose is worse in wet than in dry sea- 

 sons. By giving the cotton plenty of space 

 to let in sunlight and air the disease will be 

 less prevalent. 



It is claimed by some farmers and investi- 

 gators that deep breaking the land in the fall 

 completely burying all old cotton plants has 

 a tendency to lessen the damage from this 

 disease. 



In selecting seed be careful to avoid selecting 

 from plants affected by anthracnose. 



Cotton Wilt. This is a fungous disease 

 which attacks the roots and stems of the 

 plant. It enters the roots from the soil and 

 plugs up the water carrying vessels of the 

 roots and stems. 



