214 lilfii'UUT UF 'il lioKTlCUL,XUJUST. 



The work was continued in 1896 for the purpose of k>arning 

 whether heavy applications of Bordeaux mixture were more apt 

 to harm cherry leaves than light ones, and also for the purpose of 

 determining the fewest number of treatments necessary to control 

 the leaf spot on bearing cherry trees and when they should be 

 made. Mr. 0. K. Scoon, Geneva, N. Y., kindly offered the use 

 of his orchard for this work. One hundred and fifty-five trees 

 were included in the experiment; part of them English Morello 

 and part Montmorency Ordinaire. 



But little leaf spot was seen, even on the unsprayed trees, so 

 that but little difference could be seen between treated and un- 

 treated trees. In October a few of the latter showed more yellow 

 and fallen leaves than did sprayed trees w^hich stood near by, but 

 there was not enough difference to support any conclusions as to 

 the merits of the different methods of treatment. 



Foliage not liurt by spraying. — Contrary to the experience of 

 1895 no injury to the foliage followed the use of Bordeaux mix- 

 ture in 1896, even when the leaves were literally drenched with 

 it. It is diilQcult to find any theory which offers a satisfactory ex- 

 planation for the harmful effect of the Bordeaux mixture on the 

 cherry foliage in 1895. It is the only instance in our experience 

 in which cherry leaves have been injured by spraying with Bor- 

 deaux mixture. 



Fruit spotted hy the spray. — In 1896 the first treatment was 

 given May 14, soon after the blossoms fell. The. folio wing treat- 

 ment was made in one instance May 25, in another May 29 and 

 in a third June 3. In all cases the fruit still showed the spots of 

 Bordeaux mixture when it ripened, nearly two months later, al- 

 though considerable rain had fallen in the meantime. 



The results of these tests do not give conclusive evidence as to 

 the best way to treat the leaf spot on bearing cherry trees and no 

 definite line of treatment can as yet be recommended. 



