4. LIME-SULPHUR PREPARATIONS FOR APPLE DISEASES. 
lons of water have proved to be about as effective in the control of 
apple scab and leaf-spot 2s 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 Baumé scale, when used at a strength of 1 gallon to 
25 gallons of water, would contro! 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 satisfactory control of apple scab 
by very much stronger solutions of the commercial lime-sulphur—1 to 
11, 1 to 14, and 1 to 17—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 with the lime-sulphur solu- 
tion for apple scab, conducted by the writer? in Nebraska and 
Arkansas, gave good results, and similar experiments conducted in 
New Hampshire 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 7 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. 
@ Rural New Yorker, March 7, 1908, p. 202. 
6 Proceedings, American Pomological Society, 1907, pp. 39-45. 
¢ Cir. 27, Bureau of Plant Industry, U. 8S. Dept. of Agriculture, 1909, pp. 12-15. 
@d Cir. 27, Bureau of Plant Industry, U. 8. 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] 
