154 STATE HORTICULTURAL SOCIETY. 



cides and about the same was true of cedar rust. The lime-sulphur solu- 

 tion, however, sliowed some superiority over Bordeaux in controlling 

 cedar rust. This disease seems to yield more readily to sulphur sprays 

 tlian to copper sprays. 



Effect Oil the Fruit. — There was practically no ditt'erence between the 

 lime-sulphur solution and the Bordeaux mixture in the control of the 

 diseases that occurred on the fruit. Apple scab, fruit spot and sooty 

 blotdi were controlled equally well by both fungicides. In the case of 

 the Ben Davis, iiarticularly, however, there was a decided difference in 

 tlie' appearance of the fruit sprayed with the two kinds of fungicides. 

 The fruit sprayed with Bordeaux Avas russeted considerably, although 

 very little of it was dwarfed or distorted, as often occurs with Bordeaux 

 sprayed fruit. The Winesaps Avere also russeted, but not so much as 

 the Ben Davis; while the York Imperial showed only a slight roughen- 

 ing of the skin. 



The fruit of all varieties sprayed with the lime-sulphur 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 ap])le; but as a rule the fruit Avas smooth, clean and highly colored. 

 The high color and general appearances of this fruit Avould place it in a 

 grade higher than that sprayed Avith Bordeaux, Avhich Avould mean 

 tAventy-five cents to fifty cents a barrel in price. 



77/6' Control of Apple Hcah. — In order to determine the comparative 

 efficiency of the suljihur and copper sprays in the control of apple scab, 

 the fruit from four Winesa]) trees in each plot and six check trees were 

 sorted and the results, in terms of ]»ercentage of fruit affected Avith scab, 

 are given in the folloAving table: 



Table 1. — Lime-sulphur Solution vs. Bordeaux for Apple Scab. 



No. Per cent 



of Spray Mixture Used. of 



Plat. ■ Scabby Fruit. 



1 Commercial lime-sulphur solution (li^ to 50) plus two 



pounds arsenate of lead 2.2 



2 Home-boiled lime-suliihur solution (2-4.50) ]»lus tAvo 



pounds arsenate of lead (> . 1 



8 Bordeaux mixture (3-4-50) i»lus two pounds arsenate 



of lead 0.2 



4 Check, not sprayed 90.8 



It Avill be seen from this table that the home-made lime-sulphur solu- 

 tion and the Bordeaux mixture both held the scab doAvn to about six 

 per cent of the crop, AA'hile practically all of the unsprayed fruit Avas 

 scabby. The jjlot sprayed Avith the commercial solution had the lowest 

 I)ercentage of scabby fruit (2.2), but this was probably due to a differ- 

 ence in the plots and not in the fungicides. Plot 1 contained medium 

 sized trees, easily sprayed, while the trees in plots 2 and 3 Avere large 

 and rather difficult to spray with the outfit used. 



It would seem, from these results and those obtained in previous ex- 

 periments that the efficiency of the lime-sulphur solution as a remedy 

 for ai)p]e scab could no longer be questioned. 



