291 



"Cotton rust occurs only to a very limited extent in this 

 State, and farmsrs are indifferent to it. There is little worn 

 land in this State, and still less fertilizers are used on cotton." 



From Prof. P. H. Rolfs, Biologist of the Florida Experi- 

 ment Station, Lake City, Fla.: 



" I have yet to receive the first specimens of diseased cot- 

 ton in the State of Florida. Of course, this does not mean 

 that this plant is not diseased in this State, but it is not one 

 of those plants that is grown by those people who are most 

 interested in better farming and better cultivation. Still, we 

 hiV3 somi very excsUent people who are growing cotton and 

 making money out of it in this State." [Doubtless sea island 

 cotton is referred to.] 



From Prof. B. C. Pittuck, Agriculturist of the Texas Ex- 

 periment Station, College Station, Texas : 



"The position and nature of our experimental work this 

 year render us unable to co-operate with you in this test. 



"1. Little or none in our section. 



"2. Prairie; postoak loam underlaid by stiff blue clay 

 subsoil. 



"3. We have used kainit, but no rust occurred; hence 

 effect has not been noted. 



"4. Rast when observed, 'with one exception, has always 

 been on old land. 



" 5. Have never noticed rust on land rich in humus." 



From Director William C. Stubbs, Audubon Park, New 

 Orleans, La.: 



" I will instruct the farm managers of our three stations 

 to notice any appearances of rust in cotton, and also to assist 

 you in tracing the cause. We have such a variety of soils 

 upon the three stations that we can very easily, perhaps, as- 

 sist you in tracing this out ; although I beg to say that we 

 are rarely ever troubled with rust on either of our stations, 

 notwithstanding we are cultivating uplands at Calhoun that 

 originally would not make a bale to ten acres. I agree with 

 you, however, that soil exhaustion of humus is the main cause 

 on our uplands. This is demonstrated very largely in a coun- 

 try where fences have been removed, and we frequently find 

 the cotton rusted to the old fence row ; there we find it en- 

 tirely clear of rust. If you will read a bulletin that we have 

 published, you will find that a rotation of oats, cowpeas, cot- 

 ton, corn and cowpeas, with suitable fertilizers for each crop, 

 has proven in North Louisiana to be one of the most certain 



