22 NEW YORK STATE MUSEUM 
Tabulation of yields from unsprayed or check trees 
















| 
CLEAN FRUIT WORMY FRUIT 
| 
| 1 ' 
PLOT | SERIES| YEAR oe Bad Z Per 
| Per i Per End | and ide | cent 
Total cent Total | cent wormy, side |wormy} end 
wormy wormy 
| 
Check... I 1909 3251 23606)" 72273 885| 27.27] 312 302 A A hs ey 
Check... 2 1909 7015 S27 73808 1888] 26.92 674 630 SBA) ace 
Check... I I9Q1O Gps 202) 28.41 509] 71.59 186 240 ONES S05 oe 
Check... 2 IQ1O 2000 593] 209.65 1407| 70.35| 700 324 3831. ae 
Check... I IQII 5337 4540} 85.06 797| 14.94| 379 166 252) oe 
Check... 2 IQII} 14670 9860] 67.21 4810) 32.79) 2048 O40))) 1O03| eee 
Check... 2D IQI2 878} 342] 39.05 536| 61.05 212 238 86ln2 eae 
Grandstotaleapecstascere 33868] 23030) 67.99 ee 32.01] 4511} 28490] 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, the 
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 wormy 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 
