REPORT OF THE STATE ENTOMOLOGIST IQI2 27 
in the number of plots or a reduced number of trees in the 
plots and the figures thus indicate fair comparative values. We 
have not included in this the returns from one spray during 1912, 
since there would be no material gain were this done as the figures 
are very nearly the same, and furthermore such inclusion would 
result in a disproportionate representation of trees receiving but one 
application. The figures in the tabulation given below for the plots 
sprayed three times are-undoubtedly somewhat higher than they 
should be because there were none sprayed three times in 1910, a 
year when the second brood of the codling moth was extremely 
abundant and excessively injurious. 
Comparative tabulation of yields for 1909-11 


















CLEAN FRUIT WORMY FRUIT 
TOTAL 
NUMBER OF SPRAYS Total 
LEVEN = Total Total end 
Num- Per Total d 4 d 
ber cent ota em side an 
wormy | wormy side 
wormy 
agate ey ais! ois. siele. chs svdie.ete = ¥. clevs 98855 96117 | 97.23 2738 380 2459 IIo 
EDTA Sia att cs BY aeb/oe 54s 93766 91564 97.605 2202 2890 1997 84 
Bee Mins Ged CCT OCCT CaCI | IO4I51 91863 99.22 807 272 596 50 
LEH WS in See 66756 51722 Ap 15034 8184 8848 1998 
GITEC KS peti ern phy ote 98952 | 68064 | 68.78 30888 20730 17988 7833 
Comparative savings as a result of spraying 1909-11 
WORMY APPLES END WORMY 
ELIMINATED EAMES ELIMINATED EEN 
TREATMENT 
No. Bbls. No. Bbls. No. Bbls. No. Bbls. 
HES DEG oats ieta a cies iors 28150 FAO Sat Ales a cee | MP tren cl 20341 Coy sl Leena ceil Puritetac oir 
BASIL AV idiot aiee ose 28686 TZ 530 17; 20441 51 100 t 
ESDI A Vinge siairaticann =< + 30081 75 1395 22 20458 51 I7 te 
TESDLAY) Iat@re s\. + «rs 15854 Be || Meh etc ioe aie 12546 ZL te cer stcvae ecrater aes 





A study of the above data brings out the relative value of the 
various sprays in a somewhat different manner. Taking the check 
or unsprayed trees with their 98,952 apples or approximately 247% 
barrels as the standard, we find that one spraying in the first period 
reduces the number of wormy apples by 28,150 (70% barrels) or 
end wormy alone by 20,341 apples (5034 barrels). The one late 
spraying three weeks after blossoming, takes 15,854 apples (39% 
