REPORT OF THE STATE ENTOMOLOGIST Kjl6 



41 



on the ground and cooperates with the tower man. This latter 

 method is characteristic of the Kendall and Albion orchards and the 

 greater thoroughness possible under such conditions explains in part 

 at least, we believe, this somewhat striking discrepancy between the 

 two groups of orchards, though there are undoubtedly other factors 

 which have influenced the character of the yield. 



Relation between Shallow and total Wormy Apples 



There seems to be a moderately definite relation between shallow 

 and total wormy apples, and to show this the following tabulation 

 was prepared : 



Comparison of percentages between wormy and " shallow " apples, 1916 







KENDALL ORCHARD 



ALBION ORCHARD 



HILTON ORCHARD 



PLOT 



Wormy 



Approx. 

 shallow 



Shallow 



Wormy 



Approx. 

 shallow 



Shallow 



Wormy 



Approx. 

 shallow 



Shallow 



I 



2 



3 



Ch 



9.68 



8.68 



14-27 



1305 



4.84 

 5.78 

 9.41 

 8.60 



4.96 



5.87 



12.06 



9.00 



10.53 



11.04 



8.41 



3125 



5.26 



7.36 



5.61 



20.83 



4.62 

 7.04 

 5-93 

 7-93 



17.55 

 16.05 

 12.54 

 10.87 



8.77 



10.70 



7.36 



6.25 



7-99 

 9-15 

 8.45 

 5-93 



An examination of the above tabulation shows an interesting 

 relation existing between the percentage of wormy fruit and the 

 peculiar side injury included in the foregoing, which we have desig- 

 nated as " shallow." The first column under each plot gives the 

 percentage of wormy fruit and the third column the percentage of 

 11 shallow " affected apples. The middle column gives a figure which 

 was obtained by subtracting from the percentage of total wormy a 

 definite proportion w T hich, in the case of plot 1 is one-half, and of 

 plots 2, 3 and the check trees is one-third. It will be seen that in 

 the case of plot 1 very nearly one-half of the percentage of wormy 

 apples showed the peculiar " shallow " defect, while in the other 

 plots this type of injury was restricted fairly closely to one-third 

 of the total per cent, a marked exception being in the case of the 

 check tree in the Albion orchard, where only one-fourth of the total 

 wormy comes much nearer to representing the actual number of 

 11 shallow " affected apples. The probable explanation for this 

 marked discrepancy is that the check tree from which these figures 

 were derived, produced a smaller crop than the others and the infes- 

 tation was much more general. It is possible that this figure 



