14 NEW YORK STATE MUSEUM 



another brood of moths may appear. These in turn deposit 

 eggs which hatch in due time and the young larvae usually 

 enter the side of the fruit. Two broods appear to be the rule 

 in the northern fruit-growing sections of the United States 

 though some investigators claim a third in the southwest. 



Experimental work. The work of the last two years with 

 the codling moth was continued the present season with ex- 

 tremely gratifying results. Comparative tests were made to 

 ascertain the value of but one spraying just after the blossoms 

 fall, with a similar treatment supplemented by a second appli- 

 cation about three weeks later, namely, about the time when 

 the young codling moth larvae enter the fruit. The third plot 

 received, in addition to the two sprayings described above, a 

 thorough application the latter part of July, designed especially 

 to control the second brood. One plot, in continuance of the 

 work of last year, was given only one application about three 

 weeks after the blossoms dropped simply to test the relative 

 value of this treatment. Check or unsprayed trees were left 

 for comparison in each of the series. 



Location and treatment of plots. Series i The experiments 

 in this series were conducted in the young orchard belonging 

 to Mr W. H. Hart of Arlington, N. Y., near Poughkeepsie and 

 located close to Briggs Station on the Hopewell branch of the 

 Central New England Railroad. The orchard is on a moderately 

 high hill, the trees being thrifty, about 17 years old, 18 to 20 

 feet high and 30 feet apart. The experimental trees were in 

 all cases Baldwins. Each plot consisted of approximately 42 

 trees, 6 trees in a row one way and 7 in a row the other way, 

 the central 6 being the actual experimental trees. These latter 

 were carefully selected for uniformity in size, fruitage and 

 infestation. The one exception to the arrangement outlined 

 above occurred in plot 4 and the check trees. These latter 

 were the central 2 of the usual 6 experimental trees, while the 

 other 4 in the center of a plot containing 42 trees received only 

 the one late application. All of the barrier trees were sprayed 

 at the usual time. This modification was made because the 

 owner did not wish to have too many trees unprotected or only 

 partially protected from codling moth work. The systematic 

 and thorough commercial spraying of the two preceding years 

 had served to keep this orchard in excellent condition and, as 

 a consequence, there was not an excessive infestation by the 



