Follow-Up Woek 499 



decrease in the yields of plots 1, 2, and 3, and consequently a per- 

 centage comparison is not absolutely fair, since it is well known 

 that a higher percentage of the crop is infested when there is a 

 small yield. This is shown by the fact that in each of these three 

 plots there w^as a goodly reduction in the number of wormy apples. 



The Webster orchard showed, like the preceding, a marked bene- 

 fit in fungus control from the one, two, and three sprayings, the per- 

 centage of infected apples being for these three plots, 46.10, 26.15, 

 and 16,65, respectively, as compared with 74.77 per cent for the 

 check trees. The benefit in the control of the green fruit worm 

 was by no means striking, although there was some reduction in 

 the percentages of wormy fruit, these being 5.20, 3.27, and 3.91 

 for the plots sprayed once, twice, and three times, respectively, as 

 compared with the checks, which showed an infestation of only 

 6.36 per cent. " 



Summarizing the results for the three counties — namely, 

 Niagara, Orleans, and Monroe — the treatments reduced the 

 fungous infection of 75.71 per cent for the check trees, to 49.84, 

 27.74, and 17.78 per cent, respectively, for the plots sprayed once, 

 twice, and three times. The season, it should be borne in mind, was 

 one of unusual prevalence of fungus. There was in the series, as in 

 the plots, comparatively little benefit from repeated applications, 

 so far as controlling leaf roller or green fruit worm was concerned. 

 The average reduction of wormy applies in the three orchards, 

 resulting from a second spraying for the codling moth, amounted to 

 but 1.29 per cent, and for a third only .6 per cent, or, for the two 

 additional sprayings, a benefit of less than 2 per cent. These 

 figures compare very closely with those obtained during earlier 

 years in the Hudson Valley and strongly confirm previous conclu- 

 sions relative to the great value, for the control of the codling moth, 

 of the application just after the blossoms drop. These figures are 

 to be interpreted as emphasizing the great value of the first appli- 

 cation, namely, the calyx spray, for the control of the codling moth, 

 bringing out very clearly, it seems to us, the difficulty of making 

 up for poor work or neglect by thorough spraying later in the 

 season. 



In all fairness it should be added that the results in the Niagara 

 and Orleans County orchards were not entirely satisfactory, so far 



