276 Agriculttjkal Expeeiment Station, Ithaca, K. Y. 



not treated, Baldwin and Fallawater apples growing close by them 

 were hardly injured. I believe it can safely be said that the susceptible 

 varieties mentioned above could have been sprayed with profit four or 

 five times in order to reduce insect and fungous injury, while the com- 

 paratively resistant varieties would not have repaid any more applica- 

 tions than those necessary to control the codlin moth, two treatments 

 with Paris green being probably sufficient for this purpose. 



Another point bearing upon this subject can not be overlooked. 

 Many varieties are not uniformly attacked in different localities. It 

 may pay some growers of a certain apple to spray it thoroughly, while 

 the same variety in another locality would not warrant the expense of 

 even one treatment for scab. Dunng the summer of 1892, an attempt 

 was made to determine the amount of injury done by the scab to the 

 varieties of apples now in cultivation. The results of the work were 

 published in Bulletin No. 48, of this Station. Although the list given 

 is not so complete as might be wished, it is still of interest in this 

 connection. 



From the preceding it will be seen that no rule regarding the number 

 of applications nor the dates upon Avhich they are to be made can be 

 laid down with safety. Each grower must be his own judge. If two, 

 four or six applications are decided upon, they can be applied with 

 safety and ])rofit, in New York, upon dates given on page 270, subject 

 to the condition of the season . 



Comparative efficacy of the fxmgicides . — A fair idea of the compara- 

 tive values of the various fungicides used can be obtained by examin- 

 ing the number of first-class apples produced by the trees sprayed six 

 times with the fungicide used in each plot. 



Table III. — Showing the Per Cent of First-class Apples Pro- 

 duced in the Different Plots. 



