24 NEW YORK STATE MUSEUM 



The treatment was substantially the same as in series i, ex- 

 cept that lead arsenate (15J/2 per cent arsenic oxid), manufac- 

 tured by the Interstate Chemical Co., was used at the rate of 

 15 pounds to 250 gallons of water, and a concentrated home- 

 made lime-sulfur wash, 40-80 formula {2J Baume) was used 

 at the rate of 1 gallon to 25 of the spray. The spraying began 

 May 23d. The trees were 18 to 25 feet high and the work 

 slower and if anything more careful than in series I. The 

 tower was used, one man being located on this and the other 

 with an extension nozzle operating from the ground. There 

 was probably considerably more liquid applied per tree than in 

 the preceding series. The blossom ends were well sprinkled 

 but there was practically no penetration of the poison to the 

 inner calyx cavity. The leaves were well covered with the 

 poison and rarely flooded. There were still a few blossoms on 

 the ends of the limbs. The eastern barrier rows of plot 1 were 

 completely sprayed on the first day, and the three rows next the 

 driveway and west were sprayed from the east side beginning 

 with the experimental trees in plot 1. The next day, the 24th, 

 a few of the remaining trees were sprayed with the wind in the 

 opposite direction, though nearly constant showers seriously 

 hindered operations. The remainder of the plots, including the 

 barrier trees, were finished May 25th. Trees A and B on plot 

 2 were sprayed on the morning of the 24th, the application being 

 followed shortly by heavy showers. The spray, however, could 

 be seen upon the foliage the following day. The weather dur- 

 ing both the 24th and 25th was rather showery and spraying 

 was frequently interrupted. 



Plots 2, 3 and 4 were sprayed June 19th. The weather was 

 bright and clear with a light southeast wind. The work began 

 at 9.30 a.m. and was completed at 3.15 p.m. The B tree in 

 plot 2 contained a nest of fall webworms; this was also true of 

 one of the barrier trees. There was throughout the orchard 

 considerable crinkling and yellowing of leaves, which might be 

 attributed to former applications were it not that the unsprayed 

 trees on plot 4 as well as the check trees exhibited the same 

 conditions. There had been an excellent growth and the foliage 

 had a good color. The fruit presented a fine appearance and 

 there was an excellent setting with but few exceptions. 



Plot 3 was sprayed for the third and last time July 29th, using 

 only arsenate of lead in the proportions previously employed. 



