22 



NEW YORK STATE MUSEUM 



Tabulation of yields from unsprayed or check trees 







CLEAN 



FRUIT 



! 



WORMY FRUIT 







PLOT 



SERIES 



YEAR 



TOTAL 

 FRUIT 



Total Per 

 10tai cent 



Total 



Per 

 cent 



1 End 

 End 1 and 

 wormy, side 

 wormy 



Side 



wormy 



Per 



cent 



end 



wormy 



Check. . . 

 Check. . . 

 Check. . . 

 Check. . . 

 Check. . . 

 Check.. . 

 Check. . . 



i 



2 



I 

 2 

 I 

 2 

 2 



1909 

 1909 

 1910 

 I9IO 

 I9II 

 I9II 

 1912 



3251 

 7015 



711 



2000 



5337 

 14670 



878 



2366 



5127 



202 



593 



4540 



9860 



342 



72.73 

 73.08 

 28.41 

 29.65 

 85.06 

 67.21 

 3995 



885! 27.27 312 

 1888 26.92 674 



509 71.59! 186 

 1407 70.35 700 



797 14.94 379 

 4810 32.79 2048 



536 61.05I 212 



302 

 630 

 240 

 324 

 166 

 949 

 238 



271 

 584 



82 



383 



252 



1813 



86 





Grand to 



tal 



33868 



23030 



67.99 





2849 



3471 



21.73 











It will be seen that the check plots during this four-year period 

 gave an average percentage of sound fruit amounting to 67.99, tne 

 yield in individual plots varying from 28.41 to 85.06 per cent. The 

 smaller yields of good fruit, it should be noted, occurred on trees 

 producing relatively few apples. The average percentage of end 

 wormy fruit for these plots is 21.73, a marked contrast, as will be 

 seen later, to what was obtained from the sprayed trees. The re- 

 turns from the unsprayed trees may be briefly summarized as fol- 

 lows : Approximately one-third of the fruit was wormy and nearly 

 two-thirds of the worm) 7 apples were entered at the end, in other 

 words, were end wormy. The importance of this data will be more 

 fully demonstrated as we consider the returns from the various 

 plots. 



Results obtained from spraying during the first period. This 

 treatment is given within a week or ten days after the blossoms 

 drop, preferably as soon as possible thereafter and before the calyx 

 lobes have closed. Since the codling moth larvae or apple worms 

 do not hatch till a week or ten days after the close of this period, 

 namely, about three weeks after blossoming, we are unable to see 

 that the second treatment prior to the closing of the calyx cup, as 

 ordinarily recommended, materially affects the situation so far as 

 the codling moth is concerned, provided the first application has 

 been thorough. This is evident when it is remembered that all that 

 can be done by spraying during the period is to place the poison 

 where it will be eaten by the caterpillars or apple worms, to appear 

 later, as they attempt to enter the blossom end. The additional 



