26 



NEW YORK STATE MUSEUM 



the end wormy fruit being less than y^ of i per cent (.308 per cent). 

 The average gain in sound fruit resulting from this second applica- 

 tion, if compared with the average percentage of worm-free apples 

 obtained during the four-year period, amounts to only .09 per 

 cent and this was accompanied by only a slight reduction in the per- 

 centage of end wormy apples. 



Results obtained from three sprayings. These applications 

 were distributed so that one was given in each of the above desig- 

 nated periods, namely, one within a week or ten days after the 

 blossoms fell, the second about three weeks after the dropping of 

 the bloom and the third the latter part of July. The second was 

 designed to catch the young caterpillars of the first brood just as 

 they were beginning feeding, while the third was directed against 

 the young apple worms of the second brood. 



Results obtained from three sprayings 









TOTAL 



CLEAN 



FRUIT 



WORMY FRUIT 





















PLOT 



SERIES 



YEAR 



FRUIT 













End 





Per 











Total 



Per 



Total 



Per 



End 



and 



Side 



cent 











cent 



cent 



wormy 



side 



wormy 



end 















' 







wormy 





wormy 



3 



I 



1909 



9680 



9582 



98.99 



98 



1. 01 



8 



10 



80 





6 ....... . 



r 



1909 



7710 



7633 



99 



77 



I 



6 



3 



68 





3 



I 



I9II 



20926 



20830 



99-54 



96 



.46 



17 



2 



77 





3 



2 



I9II 



3III9 



30852 



99.14 



267 



.86 



60 23 



184 





Grand to 



:al and 



per cent 



69435 



68897 



99.22 



538 



.78 



91' 38 



409 



.185 



It was unfortunate that in 1910 no plot received these three appli- 

 cations and, as a consequence, the average percentage for this 

 treatment is somewhat higher than it should be. Even with this 

 omission which, in a measure, is undoubtedly favorable to the three 

 applications, the average percentage is 99.22, a gain for the third 

 treatment representing only 1.57 per cent. It will be noted that 

 there is a slight reduction in the average percentage of end wormy 

 apples, this being approximately ^ of i per cent (.185 per cent). 



COMPARATIVE SUMMARY 



The following tabulation of comparative yields from the experi- 

 mental plots during the first three years (1909 — 11) will prove in- 

 structive, since those from the plots sprayed three times, sprayed late 

 and checks have been raised pro rata to make up for a deficiency 



