New YorK AGRICULTURAL EXPERIMENT STATION. 291 
plums consisted of the following varieties and were infested as 
follows: 26 Burbank, 4 encrusted and the remainder moderately 
infested ; 6 Abundance, slightly infested; 1 each of Satsuma and 
Hale, slightly infested; 2 Red June, slightly infested. The 
peaches included two varieties as follows: 6 Stevens Rareripe, 3 
encrusted on about one-third of the tree and the remainder very 
slightly or not at all infested; 5 Chair Choice, 2 encrusted on 
about one-third of the tree and the remainder slightly infested. 
The trees were not all of the same age, parts of the orchard 
having been recently replanted, but those treated varied from 
eight to twelve years of age. They. have been under careful 
cultivation from the first and except for the scale are in good 
condition. | 
Checks.— Check trees of about the same condition and degrees 
of infestation were chosen from a nearby orchard. The total 
number of checks amounted to about one-fourth the number 
treated. 
Conditions.— The trees were sprayed March 31 and April 1. 
The buds were well swollen, but none of them had burst. The 
work of spraying was not begun until late in the afternoon of 
the first day and at about the time that a cold, drizzling rain 
began. Before the afternoon was over the rain was followed 
by snow and a drop in the temperature that caused ice to form 
on the trees. Before night the wet snow was clinging to the 
branches in many places to a depth of half an inch. One row 
was sprayed while the rain was falling and another after the 
snow and ice had formed on the branches. In some places the 
spray melted the snow and thereby added moisture to the 
branches until they were dripping wet. Where the ice had 
formed a thick coating, however, the mixture did not dissolve 
it but stained it a green color and finally reduced it to a green- 
ish, granular mass. To all appearances, if the mixture was not 
soon washed off by the melting snow and ice it would be frozen 
in the snow and ice and at the first thaw would be carried off. 
This did not prove to be the case, however, for by ten o’clock 
the following morning the snow and ice had melted and before 
noon the mixture was sufficiently conspicuous to give the trees 
