296 



partially decomposed vegetable matter, such as chips, trash, 



etc. 



"3. Yes, frequently, in varying quantities, but took no 

 notice of effect in relation to rust. 



" 4. Old land. 



"5. Have never noticed it in places mentioned." 



From George McDonald, Cuthbert, Ga.: 



" We suffer very little in this section from cotton rust." 



From Ernesto Madero y Huosl, Parras, Coahuila, Mexico: 



" We have not noticed in this vicinity any other than the 

 ordinary diseases of the cotton plant, sach as the root vwrm 

 in the month of April, or the leaf worm from August to Sep- 

 tember when the season is rainy. We have not seen yet the 

 "black rust" about which you inquire, and we do not know 

 its symptoms, but it must be said that our lands are very fer- 

 tile and rich, consequently giving very good crops." 



From William Strang, Piggott, Ark.: 



« I have not grown cotton in the last fifteen years. The 

 immediate cause of my quitting it was a failure of my crop 

 through the rust. I had in five acres of rich gum land, nearly 

 fresh, had been cropped two years in corn and was full of 

 humus. Cotton was planted early in May, and had been 

 thinned to a stand and cultivated. About the second week 

 of June we had much rain and continued cloudy, chilly 

 weather. The sudden checking of growth was disastrous, 

 and the field made less than a bale. Similar land in the same 

 locility was similarly affected, but cotton on poorer soils dirt 

 not suffer nearly so much. I have always attributed the rust 

 to the sudden checking of the growth." 



This may or may not have been the disease under inves- 

 tigation. The sudden checking of growth from any cause is 

 certainly one of the predisposing causes. 



From G. W. Rhodes, Saville, Ala.: 



" I have suffered very little from rust the past year, as 1 

 do not plant lands that will rust. We have a variety of soils 

 in this county, mostly a gray land with subsoil from one to 

 ten feet deep, though we have a red clay or stiff soil and also 

 a fine close gray soil. Our deep sandy soil is more subject to 

 rust than the others, but all will rust when badly worn. The 

 cause of rust in our section is the lack of proper vegetable 

 matter or humus. New ground will not rust until the humus 

 is exhausted. As the land becomes worn rust will appear 

 unless humus is supplied. I have noticed cow lots built on 



