REPORT OF THE STATE ENTOMOLOGIST IQT/ 



31 



experiences in experimental orchards durint^ the past decade, which 

 latter ai)]jears to show comparatively little mi.t^n-alion from tree to 

 tree. 



Codling math data from various orcliards, 1917 (L. F. Stricklatil) 



ORCHARD 



PICKED FnriT 



DROPPED FRUIT 



Total 

 apples 



\y. W. Button, Youngs- 

 town 



(Tree 3) 



(Tree 5) 



S. F. Burton, Kansom- 

 ville 



(Tree 16) 



(Tree 17) 



R. E. Heard, Lockport 



(Treel) 



(Tree 2) 



G. E. Manning, Ran- 

 somville 



(Tree 4) 



(Tree 9) 



Total 

 wormy 



1 087 

 1 702 



1 0,54 

 1 623 



386 

 1 117 



3 426 

 2 049 



Shal- „ Au- 



low L)eep pigt 



249 

 324 



263 

 301 



117 

 475 



1 050 

 774 



347 



377 



180 

 838 



1 300 

 1 044 



36 

 149 



End 



End 



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 ih, 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, especialh' with 

 the spraying given just after the blossoms fall and wndeU' known 

 as the calyx spray or codling 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 



