REPORT OF THE STATE ENTOMOLOGIST I917 



3t 



experiences in experimental orchards during the past decade, which 

 latter appears to show comparatively little migration from tree to 

 tree. 



Codling moth data from various orcliards, ipiy (L. F. Stricklaai) 



It will be noted on referring to the above tabulation that the 

 number of " shallow " affected apples invariably exceeds the total 

 wormy, except in the case of the dropped fruit. The average number 

 of " shallows " to each wormy apple is approximately i|, though 

 in the case of tree 2 of the Lockport orchard there are nearly 2. In 

 this tabulation every codling moth injury was counted, and since 

 from I to 5 or even 6 " shallows " may occur upon a single fruit, 

 it is easy to understand how the number of such blemishes may 

 easily outrun the number of apples affected. It is evident from 

 these data that only a comparatively small proportion of the young 

 caterpillars entering the side of the fruit penetrate to any depth, 

 and on referring to data given elsewhere it will be seen that the 

 same is true of unsprayed as well as of sprayed trees. 



Summary and Conclusions 



The experience of the last three years in western New York leads 

 us to emphasize the necessity of thorough work, especially with 

 the spraying given just after the blossoms fall and widely known 

 as the calyx spray or codUng moth spray. This is the treatment 

 which gives by far the largest returns in preventing wormy apples. 

 In our opinion a deficient or poor spraying at this time can not be 



