114: Agricultural Experiment Station, Ithaca, N. Y. 



stations, that the most important treatments are those made in the- 

 spring. The use of only two applications has been followed by such 

 good results with some varieties that this number seemed to be suf- 

 ficient to control the apple scab. But the best time for making 

 these treatments can not be stated unhesitatingly. Two applications 

 were therefore made at different times to certain King and Baldwin 

 trees to discover if possible which treatments were the most effective. 

 Three plots, or divisions were made : 



1. Two applications made before the blossoms opened : April 

 21th, copper sulphate solution ; May 7th, Bordeaux mixture. 



2. One application made just before and one immediately after 

 the blossoming of trees ; May 7th and May 19th, using Bordeaux 

 mixture. 



3. Two applications after the blossoming of the trees : May 19th 

 and May 31st, Bordeaux mixture. 



Table II. — Showing Effect of Two Applications Made at 



Different Times. 



DATE of applications. 



First 

 class. 



26 



JS^one 



April 21 



May 7 



May 7 



May 19 



May 19 | .... 



May 31 46 



42 



King. 



Second 

 class. 



27 

 .53 

 55 

 47 



Third 

 class. 



66 



22 

 4 



"7 



First 

 class. 



7 

 18 

 35 



48 



Baldwin. 



Second 

 class. 



20 



40 



30 



Third 

 class. 



73 



4^ 

 17 



22 



The yield from untreated trees is given in the above table for 

 comparison. The trees receiving the two earliest treatments were 

 greatly benefited by them. The number of third class apples was 

 reduced from 66 per cent to 22 per cent, in the case of the King 

 and the Baldwin showed a reduction from 73 to 42. There wa& 

 also a marked increase in the number of first class and second class 

 apples of both varieties. 



Turning to the second division, those treated May 7 and May 17, 

 we find that a still greater difference has been made by these two 



