288 REporRtT OF THE DEPARTMENT*OF ENTOMOLOGY OF THE 
definitely known, but at the time the spraying was done nearly 
one-third of the peaches were encrusted on the trunks and larger 
branches, and the remainder to a somewhat less degree. The 
plums were less seriously infested. The orchard, therefore, 
afforded an excellent opportunity to test the wash upon weak 
trees as well as upon the scale. 
Checks.— The checks consisted of eight trees selected as being 
representative of the various degrees of infestation and health 
of the trees throughout the orchard. An adjoining orchard of 
over a hundred trees of the same varieties, which was infested 
to about the same degree also furnished material for comparison. 
Conditions.— The trees were sprayed March 25 to 29. The 
weather was cloudy with a heavy wind most of the time. The 
temperature varied from 32° to 56° with heavy frosts at night. 
As a result of the frosts the trees were wet when the spraying 
began in the morning and did not usually dry until about the 
middle of the forenoon. | 
The trees were sprayed thoroughly once and as soon as the 
wash was dry were carefully examined and the branches that 
were not well coated were sprayed again. This was followed 
by a second examination and treatment after sufficient time 
had elapsed for the second coat to dry. After the spraying was 
finished the trees were trimmed and any branches that were 
not thoroughly sprayed were cut out. The amount of mixture 
used averaged nearly one and one-third gallons per tree. 
The weather conditions during the three weeks immediately 
following the treatment of the trees were as follows: There 
was a light rain March 28 followed by heavy showers and high 
wind the following day, which lasted from about five in the 
morning until nearly noon. Although the weather was usually - 
cloudy there was little rain until April 26. On this date and 
also on April 29 and 30 there were continued heavy rains and 
wind. Taken as a whole, the season has been a fairly wet one 
on the eastern half of Long Island, and hence in this orchard 
the adhesive qualities of the wash have been given about an 
average test. . 
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