53 



2 lbs. of lime and 4 lbs. sulfur to 50 gallons of waler. with 

 2 lbs. arsenate of lead. 



Plot 3. Bordeaux mixture, 3 lbs. bluestone and 4 lbs. 

 lime to 50 gallons water, with 2 lbs. arsenate of lead. 



Plot 4. Check, not sprayed. 



The Winesaps were sprayed (1) after the cluster buds 

 opened, just before they bloomed (April 5) ; (2) as soon as 

 the petals fell (April 19), (3) three to four weeks later (May 

 17) ; and (4) nine weeks after the petals fell (June 26). The 

 Ben Davis and York Imperial received only three treat- 

 ments, the first application given the Winesaps having been 

 omitted from these varieties, for the reason that in Virginia 

 they do not suffer seriously from attacks of scab. 



Eft'ect on the Foliage. The weather was unusually cold 

 and wet during April and May and the conditions were 

 favorable for spray injury. Toward the end I\[ay, soon 

 after the second spraying of the Ben Davis and Yorks. the 

 leaves of these varieties showed considerable spray injury 

 on all the plots. On the lime-sulfur plots, the leaves of the 

 young shoots were somewhat scorched around the margins, 

 and, as a consequence, some of them were crooked or curled. 



A few dead spots appeared on some of the leaves and 

 at that time it looked as though the injury might prove se- 

 rious. It did not progress any further, however, even after 

 the next application, and the trees soon grew out of it. By 

 mid-summer nearly all evidence of injury had disappeared 

 and during the remainder of the season the foliage was in 

 excellent condition. In respect to injury there was prac- 

 tically no difference between the home-made and the com- 

 mercial lime-sulfur. 



Bordeaux mixture caused more injury than either of 

 the lime-sulfur preparations and this injury increased as the 

 season advanced. The leaves were more or less spotted with 

 circular brown areas and a considerable percentage of them 

 turned yellow and dropped off. The trees sprayed with the 

 lime-sulfur solution went through the season with much 

 better foliage than those sprayed with Bordeaux mixture, 

 demonstrating the- superiority of the former fungicide over 

 the latter in this respect. 



The api-le leaf -spot disease was controlled equally well 

 by both fungicides and about the same was true of Qedar 

 rust. The lime-sulfur solution, however, showed some su- 

 periority over Bordeaux in controlling cedar rust. This 



