NEW YORK STATE MUSEUM 



Tabulation of yields from unsprayed or check trees 



1 



1 



1 



CLEAN 



FRUIT 



1 



WORMY FRUIT 







PLOT 



1 



SERIES 



YEAR 



TOTAL 

 FRUIT 



Total 



Per 

 cent 



Total 



Per 

 cent 



End 

 End and 

 wonnj- side 

 wormy 



Side 

 wormy 



Per 



cent 



end 



wormy 



Check. . . 

 Check. . . 

 Check. . . 

 Check. . . 

 Check. . . 

 Check... 

 Check. . . 



I 

 2 



I 

 2 

 I 

 2 

 2 



1909 

 1909 

 191O 

 191O 

 1911 

 I911 

 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 

 39-95 



885 27.27 

 1888 26.92 



509, 71.59 

 1407] 70.35 



797 j 14.94 

 4810 32.79 



536' 61.05 



312 

 674 

 186 

 700 

 379 

 2048 

 212 



302 

 630 

 240 

 324 

 166 

 949 

 238 



271 

 584 



82 



383 



252 



1813 



86 





Grand to 



i 



tal 



33868 



23030 67 00 



10832! ^2 ml /|!;tt 



2849 



3471 



21.73 











1 





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

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

 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. ^ 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 wormy apples were entered at the end, in other 

 words, were end w^ormy. 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 



