COTTON CULTURE 55 



the forks of the main ribs of the leaf. The yellowing is 

 sometimes nearly white, and is the result of a failing nu- 

 trition of the leaf. At an early stage of the disease the 

 leaves begin to brown at the point at which the yellowing 

 first appeared; then they die and fall. In sandy land the 

 disease makes rapid progress; very few of the leaves may 

 show the color, but on a hot or dry day, they suddenly wilt. 

 Remedy. The authorities give no specific remedy. It 

 is a fungus disease, and may be checked by liberal ferti- 

 lization accompanied by clean and thorough cultivation. 

 If very severe, a rotation must be practiced to free the soil 

 of infection. 



SORE SHIN 



This is also known as "Damping off," and "Seeding 

 rot." It is a fungus disease, favored by excessive rainy 

 weather during the early stages of growth. It appears 

 in large plants which have been injured by bruising through 

 careless use of cultivators, etc. The best checks are drain- 

 age and cultivation. Care in working the soil will pro- 

 tect the larger plants. 



ANTHRACNOSE 



This disease attacks principally the bolls, but also in- 

 fects stems and leaves. The accompanying cut indicates 

 the nature of the diseased bolls. The disease origi- 

 nates in minute spots of a dull reddish color wMch 

 soon give place to a blackening of the tissue as the 

 spot enlarges. 



