498 Kepokt of Faemeks' Institutes 



being left for comparison. The first application was made just 

 as the petals were dropping, namely, about May 19 ; the second 

 approximately three weeks later — June 8 to 10; and the third 

 the latter part of July, at the time the second brood of codling moth 

 larvae are supposed to begin their work. About three pounds of 

 paste arsenate of lead and the usual amounts of lime-sulphur were 

 used in each application. 



There were some differences between the various plots, yet all 

 showed material benefit as the result of one spraying and a less 

 evident betterment from the second and third, so far as control of 

 the codling moth was concerned. This was, however, markedly 

 different in the case of fungous infection, which, in the Newfane 

 orchard, was reduced by the first spraying from 88.45 per cent 

 fungoiis-aft'ected fruit in the check trees to 80.05 per cent in the 

 case of the plot sprayed but once. An additional application, the 

 second, brought the fungous-infected fruit down to 40.04 per cent, 

 while the third treatment reduced it to 23.57 per cent. The bene- 

 fit from the two later applications, so far as control of fungas is 

 concerned, is so marked that further comment is unnecessary. 



There was very little benefit from these three sprayings in 

 regard to checking the leaf roller or green fruit worm ; there was a 

 higher percentage of injury by the codling moth in the plot sprayed 

 three times, though this is doubtless explainable by local condi- 

 tions and is in no way to be construed as militating against repeated 

 applications. 



The Kendall orchard, like the one at !N"ewfane, shows a marked 

 benefit in control of fungus from the three applications, the per- 

 centages of the infected fruit being 36.45, 12.04, and 11.52 for 

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

 compared with the checks, which had over half the fruit — 62.82 

 per cent — infected with fungus. In this series, as in the preced- 

 ing, there was no marked benefit from these sprayings, so far as 

 control of the green fruit worm was concerned, and apparently 

 none in the case of the codling moth, the percentage of wonny fruit 

 being 27.67, 31.64, and 34.52, respectively, for the plots sprayed 

 once, twice, and three times, as compared with 67.58 per cent for 

 the unsprayed or check trees. This apparent discrepancy is to be 

 explained, however, by the fact that there was a progressive 



