REPORT OF THE STATE ENTOMOLOGIST I918 



21 



two trees, X and Y, were three trees west of the six included in the 

 experimental plot and were in the same row, tree Y being north of 

 tree X. The lettering of the trees in the experimental plot was the 

 same as in earlier years, it running from east to west. Tree B bore 

 over 5 barrels, tree C 7I barrels, tree D approximately 10 barrels; 

 tree F 7I barrels, tree X 6| barrels and the half of tree Y 4 barrels. 

 The results of this work are given in the tabulation below. 







Heard orchard, 



I918 













TOTAL 

 FRUIT 



PER- 

 FECT 



SCAB 



LEAF 

 ROLLER 



CODLING MOTH, WORMY 



TKEES 



Total 



End 



Side 



Side 

 Aug. 



Shal- 

 low 



B 



Total 



3 718 



2 840 

 76.38 



3 I2S 

 62.7s 



3 700 

 64.04 



4 OSO 

 76.70 



2 704 

 60.69 



I 67s 

 57.26 



94 



2.S2 



399 

 8.01 



392 

 6.78 



27S 

 S.21 



612 

 13.73 



190 

 6.49 



808 

 21.73 



I IS4 

 23-17 



I 320 



22.84 



7S9 

 14.37 



676 

 15.17 



829 

 28.34 



128 

 3.44 



287 

 5.77 



328 

 5. 67 



188 

 3.56 



436 

 9.78 



222 

 7.58 



3 

 .08 



20 

 .40 



4 

 .06 



4 

 .07 



33 



•74 



7 

 .23 



14 

 .37 



36 

 .72 



51 

 .88 



30 



.57 



64 

 1.43 



22 

 • 75 



8 



.21 



14 

 .28 



39 

 .67 



8 

 .15 



28 

 .62 



9 

 • 30 



112 



Per cent 



3.01 



C 

 Total 



4 979 



5 777 

 5 280 



231 



Per cent 



D 



Total 



P er cent 



F 

 Total 



4.63 



274 

 4-74 



1 54 



Per cent 



2.92 



X 



Total 



Per cent 



4 4SS 



340 

 7.63 



Y 



Total 



Per cent 



2 92s 



193 

 6.59 



It will be seen from the above tabulation that the trees receiving 

 a special tobacco-arsenate spray bore a smaller percentage of wormy 

 fruit than those which were untreated. This is specially marked in 

 the case of trees B and F, each with a total wormy fruit of 

 about 3^ per cent while the check trees yielded over 9I and 

 7 1 per cent of wormy apples. The somewhat high percentage of 

 wormy fruit on trees C and D is probably to be accounted for in part 

 at least by the large size of the trees and the crowded condition in 

 the orchard rendering it difficult to secure the uniform and thorough 

 treatment so desirable in experimental work. It can at least be 

 said that this application appears to have reduced materially the 

 number of wormy apples. The data here, as in earlier experimental 

 work, indicate a considerable uniformity in the proportion of 

 " shallow-affected " fruit to the total wormy. For example, the 



