REPORT OF THE STATE ENTOMOLOGIST 19IO 



31 



maximum tree A produced 179 apples, 61.46 per cent being sound, 

 and also the maximum number of wormy fruit, namely 69. The 

 minimum tree B yielded only 16 apples, 50 per cent being sound, 

 while the minimum per cent of sound fruit, 31.04, was found on 

 tree D with its total of 87 apples. The minimum number of wormy 

 apples occurred on tree B, 8, or one-half the total number being 

 thus affected. Summarizing the data for this group of trees, it 

 will be seen that only 49.33 per cent of the total yield of 444 were 

 sound. A total of 45 per cent of the fruit was side wormy, while 

 only about 6 per cent was end wormy. 



The check trees produced a total of 390 apples, only 33.34 per 

 cent being sound. 45 per cent were side wormy or end and side 

 wormy, while 31 per cent were end wormy or end and side wormy, 

 showing in this respect a marked difference from the fruit borne 

 by the sprayed trees. 



Summary of plots 





PLOT 



TOTAL 



CLEAN FRUIT 



WORMY FRUIT 



serie 



Total 



% 



Total 



% 



End 

 End and 

 wormy side 

 wormy 



Side 

 wormy 



Exit 

 hole 



I 



Exit 



hole 



2 



I 



I 



1839 

 2846 

 8135 

 7316 



7594 

 529 

 444 

 711 



2000 



88 



390 



1664 



2756 



6677 



6105 



4355 



371 



219 



202 



593 



36 



130 



90.48 

 96.84 

 82.08 

 83.45 

 57.35 

 70.14 

 49.33 

 28.41 

 29.65 

 43.19 

 33.34 



175 



90 



1458 



1211 



3239 



IS8 



225 



509 



1407 



SO 



260 



9-52 

 3.16 

 17.92 

 16.55 

 42.65 

 29.86 

 50.67 

 71.59 

 70.35 

 56.81 

 66.66 



16 



6 



160 



127 



1485 



12 



25 



186 



700 



20 



84 



21 



I 



27 



10 



326 



4 



240 



324 



13 



38 



138 



83 



1271 



1074 



1428 



146 



196 



82 



383 



19 



138 



83 



33 



485 



581 



882 



23 



44 



298 



372 



2 



53 



3 





2 





2 





3 

 5 





2 





3 



33 



3 



I 

 2 

 3 

 4 



Wealthy 



Mackintosh. . . 



Checks 



Checks 



Wealthy checks 

 M'k't'h checks 



■■■40 

 20 



4 



A study of the above record shows almost the same percentage 

 of infestation, namely 71.59 and 70.35 respectively, for the check 

 trees in series i and 2. These two orchards were in the same general 

 region and the results should therefore be approximately comparable. 

 There is, however, a markedly higher percentage of side or end 

 and side wormy in the checks of series i, this totaling 322 and 

 amounting to 45.28 per cent, while in series 2 the checks produced 

 707 side or end and side wormy, or but 35.35 per cent. The number 

 of side wormy alone in these two checks is approximately propor- 

 tional to the number of apples produced by the respective trees. 

 These figures would indicate, in a general way at least, substantially 

 identical conditions in the two series so far as infestation by the 

 codling moth is concerned. A comparison of the percentage of 

 wormy apples obtained on plots i and 2 in series i and those obtained 

 on plots I and 2 in series 2, shows a marked and constant variation. 

 Plot I series i produced 90.48 per cent of sound fruit, while the 



