New YorK AGRICULTURAL EXPRRIMBNT STATION. 407 
under experiment. It was made May 7, after the leaf buds 
opened but before any of the blossoms were open. 
The second treatment for the trees which were sprayed in 
bloom was made May 21, to 14 Baldwin and one R. I. Greening 
tree and to the north side of five other R. I. Greening trees. 
This spraying was done with especial thoroughness go as to hit 
as many of the open blossoms as possible. Nearly all of the 
blossoms were open at this time. The trees showed an unusual 
abundance of bloom. The second treatment for the correspond- 
ing trees which were not sprayed in bloom was not given till 
May 29 and June 1 when the trees were just out of bloom. At 
this time 14 other Baldwin trees were sprayed and also the south 
side of the five R. I. Greenings which had been sprayed on the 
north side May 21. This treatment was made just as thoroughly 
as the treatment of May 21. 
The third treatment was given to all trees alike June 1l. The 
fruit was then about the size of cherries. 
In all these treatments Bordeaux mixture, 1 to 10, was used 
combined with sodium arsenite. The latter was used at the rate 
of 3 1b. of the white arsenic from which it was made to 100 gal- 
lons of the spray mixture. 
Effect of the spray upon the open blossoms.—The trees which had 
been sprayed in bloom were examined May 29 and it was evident 
that very many of their blossoms had been killed by the treat- 
ment. Nevertheless the bloom had been so abundant that includ- 
ing the comparatively few, but really large number, which had 
escaped injury because they were not open May 21, there were 
enough blossoms which were not hit by the spray, to provide 
for a fair to good setting of fruit. Even on trees which were not 
sprayed in bloom Mr. Wilson estimated that 90 per ct. of the 
*The row of Baldwin trees not sprayed in bloom was treated with Bor- 
deaux mixture alone May 4 just after the leaf buds opened but the rain 
interfered with continuing the treatment to the row which was to be 
sprayed in bloom. On May 7 they were treated with Bordeaux and 
sodium arsenite as were also the trees which were to be sprayed in Lloom. 
This is what is called above the “first treatment.” 
