REPORT OF THE STATE ENTOMOLOGIST I9II 39 



the figures being grouped so as to show the results from various 

 applications. The single spray applied to the different plots dur- 

 ing this period gave from 82.08 to 99.26 per cent of sound fruit 

 or an average of 97.23 per cent for the three years, when com- 

 parisons are made between an equal number of plots in each 

 year. It should be noted that the low percentages occurred in 

 1910, a season remarkable for the unusual destructiveness of the 

 second brood and one presenting infrequent conditions which 

 were accentuated by the small yield of the experimental trees. 

 Excluding the data for this year, the lowest percentage of sound 

 fruit obtained from one spraying was 97.52. Incidentally we 

 would call attention to the fact that less than ^ of 1 per cent 

 (.394 per cent) of the wormy fruit from the trees receiving but 

 one spray were end wormy. 



The six plots receiving two sprayings during this period pro- 

 duced from 83.45 to 99.54 per cent of sound fruit or an average 

 of 97.65 per cent, the end wormy fruit constituting about y$ of 

 1 per cent (.308 per cent). It will be observed that the average 

 gain in sound fruit resulting from this second application was 

 .42 per cent and that there was a slight reduction in the per- 

 centage of end wormy. 



It was unfortunate that in 1910 no plot received three applica- 

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

 group is 99.22 of sound fruit, a yield undoubtedly relatively 

 higher than would have been the case if two plots for 1910 

 could have been included. Even with this omission which, in a 

 measure at least, is favorable to the three applications, the 

 average percentage gain between two and three treatments is 

 only 1.57 per cent, while the average percentage of end wormy 

 is even smaller than in the preceding plots, namely, .185 per cent. 



The three plots receiving one late application during 1910 and 

 191 1 gave an average percentage of sound fruit of only 77.47, 

 there being a range for individual plots from 57.35 to 93.57. 

 This average percentage of sound fruit is approximately midway 

 between that obtained from one spraying and the yield on the 

 check trees. The percentage of end wormy, 12.26, is a great 

 increase over that in the preceding plots and shows in a con- 

 vincing manner where the late spray lacks efficiency. 



The check trees during this period gave an average percentage 

 of sound fruit of 68.78, the yield varying in individual plots 

 from 28.41 to 85.06. This small yield of good fruit, it should be 



