REPORT OF THE STATE ENTOMOLOGIST IQI7 25 
The average percentage of wormy apples for the check trees was 
41.69 with an average of end wormy of 8.51, of side July of 14.60, 
shallow 19.10 and side August 8.11 per cent. 
Briefly stated, these unsprayed trees show a big increase in the 
end wormy, the side July and the side August, this being especially 
true of the former two, whereas the average percentage of shallow 
affected apples is less than half of the total percentage of wormy 
fruit. Broadly speaking, were we to take from the total wormy on 
the check trees the excess percentage of the side July and side 
August as compared with the sprayed trees we would have approxi- 
mately the same relative amount of shallow affected fruit on the 
unsprayed trees as upon those which were sprayed. In other words, 
these figures support the contention that the spraying of one season 
has little effect upon the proportion of side or shallow injury of the 
same year, and that the reduction in the amount of this type of 
mischief must be brought about largely by the applications of 
earlier years reducing the total infestation of the orchard. This is 
one of the strong arguments for systematic annual spraying without 
regard to the yield. 
Barker orchard, summary of plots, 1917 









CODLING MOTH, WORMY 
TOTAL | PER- LEAF 
PLOTS FRUIT | FECT | SCAB | ROLLER : 
Side Shal- Side 
Total | End July low | August 
ied Noy ea Aa ee 7 392 | 3 843 | I 343 | I 230 | I 400 50 305 859 264 
IRemicentarrynis cteie)|\vssrecs 51.98 | 18.16 16.63 | 18.93 .69 AS12) |) rr362 3.57 
Dee Ota yates s, tere + 8 687 | 5 430 | I 510 716 | I 405 15 194 | I 153 80 
PETECETIGn sel vere. ll tsrwerats 62550) |) 27235 8.24 | 16.17 or7 223) Wels oi, .92 
23 oy ne ee ee TT OLS || 5 036 | 3 713 I 098 | I 150 24 I49 | I 027 14 
REnIGEN be chaceeise|| esses 53.89 | 33.71 9.96 | 10.44 122 pts 9.32 Ait) 
Checks 
Rotale eer... I 739 525 690 140 725 148 254 332 I41 
Remeenterr: isles. 6 6 30.18 | 39.67 8.05 | 41.69 8.51 | 14.60 | I9.10 fy ie 




In a study of the summary of these plots allowance should be made 
for the fact that there is a progressive increase in yield in plots 1, 
2 and 3, though not necessarily because of the increased number of 
applications. This has a bearing, as pointed out earlier, upon the 
percentages of infested or infected fruit. There is not a consistent 
gain in the perfect and an inconsistent increase in the scabby fruit, 
as compared with plots 2 and 3, due probably to some factor not 
