482 Report of tub Mycologist op the 



It may be asked what was the object of alternating salt solu- 

 tion with coppei' sulphate solution. It does not seem reasonable 

 to suppose that the two fungicides used together in alternation 

 could give better results than when used separately, but inas- 

 much as some carnation growers in the vicinity of Boston have 

 advocated this treatment it was thought best to give it a trial. 



From this experiment it appears that Michigan is more suscep- 

 tible to rust than either Daybreak or No. 54. However, other 

 observations show that Daybreak takes rust very easily. 



An Expekimext on Prevention of Rust by Spraying. 



In March, 1895, we received from Fred Dorner & Son of La- 

 fayette, Indiana, 3000 healthy* cuttings of the variety Uncle 

 John. These were placed in a rust-free propagating house and 

 while rooting they were sprayed weekly with potassium sulphide 

 solution, strength 1 ounce to 1 gallon. Every precaution was 

 used to keep them from rust infection. May 18 they were set in 

 the field. 



They were set in 11^ rows. A few days later the partial row 

 was filled out with rooted plants received from Dorner & Son. 

 There were then 12 rows containing about 3100 plants. Spraying 

 was begun May 23 as follows: Two rows were spi'aj^ed with 

 potassium sulphide solution, one ounce potassium sulphide to one 

 gallon of water; three rows were sprayed with copper sulphate 

 solution, two pounds of copper sulphate to forty-five gallons of 

 water; two rows were sprayed with salt solution, eight pounds of 

 salt to forty-five gallons of water; three rows were sprayed with 

 Jiordeaux mixture made of six pounds of copper sulphate, with 

 sufficient lime to neutralize it, to forty-five gallons of water; the 

 remaining row was left for a check and not sprayed at all. Sub- 

 sequent sprayings were made at intervals of about one week on 

 the following dates: June 1. 8. 11, 21 and 28, July 10, 16, 22 and 

 31, August 10, 16 and 24. 



• I have iiiquirpd carpfuHv 'nf'^ ilip oprdii n of Jlr. Dorner's place. I am nssured by 

 Mr. Dornpr and also , by Drl .1. C. Arthur, b. tanisf of the. In^'iana Experiment Station, 

 that air Dorner has nevfr had ary rust on his premises. I:r. Arthur pays tliat tlip nearest 

 place where rust is found is at Indianapohs, (iO miles from Lafayette. The original healthy 

 condition of the cuttings Is beyond question. 



