REPORT OF THE STATE ENTOMOLOGIST I917 



31 



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 orchards, 1517 (L. F. Strickland) 





PICKED FRUIT 



DROPPED FRUIT 



ORCHARD 



Total 

 apples 



Total 



wormy 



Shal- 

 low 



Deep 



Au- 

 gust 



End 



Total 

 apples 



Total 

 wormy 



Shal- 

 low 



Deep 



Au- 

 gust 



End 



W. W. Dutton, Youngs- 

 town 

 (Tree 3) 



1 087 

 1 702 



1 054 

 1 623 



386 



1 117 



3 426 



2 049 



249 

 324 



263 

 301 



117 

 475 



1 050 



774 



392 

 440 



347 

 377 



180 

 838 



1 300 

 1 044 



36 

 149 



67 

 73 



22 

 196 



234 



188 



4 

 3 



44 

 34 



13 

 56 



94 

 45 



1 



2 



"l 



3 



9 



25 

 17 



51 

 30 



8 

 120 



72 

 60 



20 



8 



40 

 26 



6 

 103 



50 

 44 



16 



21 

 13 



"58 



11 

 9 



16 

 10 



39 



28 



6 

 89 



49 

 33 



.... 





(Tree 5) . . . 





S. F. Burton, Ransom- 

 ville 

 (Tree 16) 



1 



(Tree 17) 



1 



R. E. Heard, Lockport 

 (Tree 1) 





(Tree 2) 



G. E. Manning, Ran- 

 somville 

 (Tree 4) 



7 



(Tree 9) 



9 







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 ij, 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 1 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 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 



