410 Report of the Horticultural Department of the 



not hit in. the center by the spray and of course these escaped 

 injury. 



Effect of the spray on the open blossoms. — The trees sprayed in 

 bloom May 19 were examined May 24. At that time there was 

 apparently but little injury from spraying the open blossoms but 

 on June 5 these trees and also those which were sprayed in bloom 

 May 24 showed great numbers of clusters in which part or all 

 of the blossoms had died from the effect of the spray. This 

 injury could be readily recognized when the trees which had 

 been sprayed in bloom were compared with corresponding trees 

 not so treated. 



With the assistance of Mr. Gardner the following estimate was 

 made of the amount of bloom on the trees under test. 



Twenty Ounce all very heavy. 



Tompkins King all very heavy. 



Roxbury Russet sprayed in bloom ; one light, one heavy. 



Roxbury Russet not sprayed in bloom; one light, one medium. 



Rhode Island Greening sprayed in bloom; both very heavy. 



Rhode Island Greening not sprayed in bloom; two light, two 

 very heavy. 



Mr. Gardner reported June 29 that there was practically no 

 difference in the drop of fruit from, the two lots of trees under 

 test; all were holding the fruit well. During the summer the 

 foliage remained healthy and the fruit fair and free from scab or 

 other disease. The Tvrenty Ounce fruit was somewhat russeted 

 from the effect of the spraying in bloom. An inspection of the 

 trees of this variety August 17 showed but little if any difference 

 in the amount of fruit on trees sprayed in bloom and the trees 

 not so treated. On the other hand there seemed to be decidedly 

 less fruit on Roxbury Russet trees sprayed in bloom than on the 

 corresponding trees which did not receive this treatment. The 

 same was true of R. I. Greening. On Tompkins King, the spray- 

 ing in bloom also seemed to have thinned the fruit somewhat. 



In October, when the fruit was picked, there was so little 

 fruit on any of the Roxbury Russet trees under test that it was 

 of no use to keep the record of the yield. Through an oversight 



