54 



disease seems to yield more readily to sulfur sprays than to 

 copper sprays. 



Effect on the Fruit : There is practically no difference 

 between the lime-sulfur solution and Bordeaux mixture in 

 the control of the diseases that occurred on the fruit. Apple 

 scab, fruit spot, and sooty blotch were controlled equally 

 well by both fungicides. In the ease of the Ben Davis, 

 particularly, however, there was a decided difference in the 

 appearance of the fruit sprayed with the two kinds of 

 fungicides. The fruit sprayed Avith Bordeaux mixture was 

 russeted considerably although very little of it was dwarfed 

 or distorted as often occurs with Bordeaux sprayed fruit. 

 The Winesaps were also russeted but not so much as the 

 Ben Davis, while the York Imperial showed only a slight 

 roughening of the skin. 



The fi-uit of all varieties sprayed with the lime-sulfur 

 solution was almost free from spray russet. The natural 

 russet of the stem end was enlarged slightly and on some 

 specimens this ran over on to the side of the apple, but as a 

 rule, the fruit was smooth, clean, and highly colored. The 

 high color and general appearance of this fruit would place 

 it in a grade higher than that sprayed Avith Bordeaux which 

 would mean twenty-five cents to fifty cents a barrel in 

 price. 



The Control of Apple Scab : In order to determine the 

 comparative efficiency of the sulfur and copper sprays in 

 the control of apple scab, the fruit from four Winesap trees 

 in each plot and six check trees were sorted and the results, 

 in terms of percentage of fruit affected with scab, are given 

 in the following table : 



Table I. Lime-sulfur Solu'ion vs. Bordeaux for Apple 

 Scab. 



Per cent, of 

 No. of Plot. Spray Mixture Used. Scabby Fruit 



1 Commercial lime-sulfur solution (1 1-2 



to 50) plus 2 lbs. of arsenate of lead, 2.2 



2 Home-Boiled lime-sulfur solution (2- 



4-50) plus 2 lbs. arsenate of lead, 6.1 



3 Bordeaux mixture (3-4-50) plus 2 lbs. 



arsenate of lead. 6.2 



4 Check, not sprayed, 99.8 



It will be seen from this table that the home-made lime- 



