4 LIME-SULPHUE PREPARATIONS FOR APPLE DISEASES. 



Ions of water have proved to be about as effective in the control of 

 apple scab and leaf-spot r.s Bordeaux mixture and to be much less 

 injurious. 



Prof. A. B. Cordley,'* in 1908, seems to have been the first to point 

 out the possibility of dilute lime-sulphur solutions as a substitute for 

 Bordeaux mixture in the treatment of apple diseases, especially scab. 

 In an address before the 1907 meeting of the American Pomological 

 Society, the writer ^ gave results of experiments which he conducted in 

 Arkansas, showing that a self-boiled lime-sulphur mixture might be 

 expected at least partially to control bitter-rot and scab. Again in 

 the Western Fruit Grower of January, 1909 (pp. 5-6), the writer 

 showed that the commercial lime-sulphur solution registering 32 

 degrees on the Baume scale, when used at a strength of 1 gallon to 

 25 gallons of water, would control apple scab on the Winesap about as 

 well as Bordeaux mixture without materially injuring the fruit or 

 foliage. In the same issue of the paper just mentioned (pp. 6-7), 

 Prof. R. Kent Beattie reported the satisfactoiy control of apple scab 

 by very much stronger solutions of the commercial lime-sulphur — 1 to 

 11, 1 to 14, and 1 to 17-;7-and he reported no injury whatever to foliage 

 or fruit. 



In 1908 the writer'^ controlled the cherry leaf-spot in Illinois with 

 the commercial lime-sulphur solution, 1 gallon to 40 gallons of water, 

 and with the self-boiled lime-sulphur, as well as with Bordeaux mix- 

 ture. During the same year experiments Avitli the lime-sulphur solu- 

 tion for apple scab, conducted by the "WTiter '^ in Nebraska and 

 Arkansas, gave good results, and similar experiments conducted in 

 New Hampsliire during the same year by Dr. Charles Brooks^ in 

 cooperation with the writer showed the commercial solution to be 

 almost as effective against apple scab as Bordeaux mixture. 



Mr. Errett Wallace / reports that in experiments which he con- 

 ducted in New York during 1909 the commercial lime-sulphur solu- 

 tion at a strength of 1 gallon to 30 gallons of water did not injure 

 fruit or foliage and was as effective in controlling apple scab as Bor- 

 deaux mixture, although the disease was not serious in the orchard 

 treated. Although none of the experiments referred to above were 

 exhaustive, the evidence thus far points to the lime-sulphur solution 

 as a valuable substitute for Bordeaux mixture, at least in the treat- 

 ment of apple scab. 



a Rural New Yorker, March 7, 1908, p. 202. 

 b Proceedings, American Pomological Society, 1907, pp. 39-45. 

 cCir. 27, Bureau of Plant Industry, U. S. Dept. of Agricultm-e, 1909, pp. 12-15. 

 dCir. 27, Bureau of Plant Industry, U. S. Dept. of Agriculture, 1909, pp. 15-17. 

 « 19th and 20th Annual Reports, New Hampshire Agricultural Experiment Station, 

 pp. 385-389. 



/ Western Fruit Grower, January, 1910, pp. 24-25. 

 [Cir. 54] 



