REPORT OF THE STATE EXTOMOLOGIST IQCQ 37 



Friend nozzle (an improvement of the Vermorel typej the last 

 Aveek in July for the purpose of destroying the second brood 

 of the codling moth. The first test was duplicated in the 

 orchard of Edward Van Alstyne at Kinderhook, X. Y. 



Treatment of plots 



\'ermorel nozzles. Plot i. An early spray just after the 

 blossoms fall ; plot 2, the same as above and a second spray 

 before the calyx lobes close; plot 3, the same as plot 2 but 

 with an additional spray, using a Friend nozzle the latter part o£ 

 July for the second brood. 



The spraying with these nozzles followed the usual practice 

 of orchardists, the aim being to cover the entire tree, including 

 the tips of the young apples, with a fine, misty spray. 



Bordeaux nozzles. Plot 4. One application just after the 

 blossoms fall ; plot 5, the same as plot 4 but Avith a second 

 spraying just before the calyx lobes close; plot 6, the same 

 as plot 5 but with a third application with a Friend nozzle 

 the last of July for the control of the second brood. 



The nozzles were set so as to give a maximum of rather 

 coarse spray which would not break up into fine spray until 

 about 6 feet from the nozzle. The aim of the application was 

 to drive the poison straight down into the tip of every young 

 apple, the nozzle being held about 18 to 24 inches from the 

 fruit so far as possible. The pressure was maintained at about 

 150 pounds. 



Location and treatment of plots. The above series of experi- 

 ments were conducted in a young orchard belonging to 'Sir 

 W. H. Hart of Arlington, N. Y. near Poughkeepsie and lo- 

 cated close to Briggs Station on the Hopewell branch of the 

 Central New England Railroad. The orchard is on a moder- 

 ately high hill, the trees being thrifty, about 15 years old, 

 15 to 18 feet high and 30 feet apart. The actual experimental 

 trees were Baldwins though some of the barrier trees were 

 Northern Spy. Each plot consists 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 in- 

 festation. An examination of one tree resulted in finding 13 

 empty codling moth cells and in another none. These were 

 not in experimental areas. The orchard as a whole had not 

 been sprayed much prior to this year. A road runs along the 



