404, Report oF THE HORTICULTURAL DEPARTMENT OF THD 
sprayed on the east side only. Later they were sprayed on the 
opposite side. . 
Three trees of Alexander, 6 of Twenty Ounce, 4 of Pumpkin 
Sweet (commonly called Pound Sweet), 3 of Baldwin and 3 of 
Hubbardston were similarly sprayed in bloom and an equal num- 
ber of corresponding trees of the same varieties not sprayed in 
bloom were compared with them. 
Observations later showed that on the treated trees many 
blossoms had been destroyed by the treatment. On the treated 
Baldwin the fruit which had set generally developed either from 
the very early or from the late blossoms. Plate LVII, Fig. 1, 
shows a treated cluster in which no fruit has developed except 
possibly one from a late, outside blossom. On corresponding 
Baldwin trees which were not sprayed in bloom, not only had 
the center blossom of the cluster generally set, but often two or 
three or more of the other blossoms of the cluster had also set 
fruit as shown in Table XII and illustrated by Fig. 2, Plate 
LVII. 
These results indicate that at the time when the spraying was 
done the earliest of these Baldwin blossoms were already too far 
advanced and the latest were not open enough to be injured by 
the spray, while the lately opened mid-season blossoms generally 
succumbed to the treatment, probably because the process of 
fertilization had not yet progressed far enough to place them 
beyond danger from the poisonous effect of the spray mixture. 
For a comparison of the number of blossoms which set on the 
Baldwin and Pumpkin Sweet which were sprayed in bloom and 
on the corresponding trees not sprayed in bloom, see p. 393. On 
the Oldenburg trees the earliest blossoms to open were generally 
the ones which were killed by the spray; in many cases only the 
center blossom of the cluster was killed. The fruit which set on 
Oldenburg sprayed in bloom generally developed from the blos- 
soms which opened in mid-season or later. 
When the June drop of fruit occurred, Mr. Collamer reported 
that he could see no difference between the trees sprayed in 
bloom and those not so treated in the percentage of the fruit 
