New York AGRICULTURAL EXPERIMENT STATION. 209 
_ were more or less infested with the scale. At the time of the treat- 
ment several of the adjoining trees had succumbed and a goodly 
number of those selected showed considerable dead wood as a 
result of injuries by this pest. The peach orchard has never 
been sprayed for insects or diseases. A small portion of the trees 
at the time of planting were first fumigated with hydrocyanic 
acid gas. The apple trees were variously infested with the scurfy 
bark louse and the San José scale. 
The number of trees treated in this experiment was 666, con- 
sisting of 79 large apples, 35 pears, 257 plums, 39 cherries, 6 crabs 
and 252 peaches, which was sufficient to give definite results. In 
each orchard checks were reserved, which were as nearly repre- 
Sentative as possible of the varieties, and of similar condition 
with respect to scale and past treatment as those under experi- 
ment. 
CONDITIONS. 
In the experiment at Queens the washes were applied during 
November 8 and November 13. The weather was clear with light 
- south winds. The precipitation during the two weeks immedi- 
ately following the last application was as follows: November 14, 
075 inch; November 17, .805; November 23, 105; November 29, 
snow flurries. 
At Geneva the applications of the washes were made during 
November 16 and November 27. The weather during this period 
was usually cloudy with light winds. The temperature varied 
in the mornings from 18° to 40°, and in the afternoons from 12° 
to 47° Fahr. Light snows fell daily between November 18 and 
27. For the month following the last applications there was a 
gradual decline in the temperature, with light snows occurring 
Ge Weeember o, 6, 1..5,.0, 00. to. 14, 15, 16) 17,18. 19, 2122, 
24, 25, 26 and 27. 
The trees were sprayed once carefully and upon the following 
day a second treatment was made to cover the portions of the 
trees, which were not well coated by the first application. The 
time for the satisfactory spraying of the orchards was very lim- 
ited owing to the retention of the foliage upon the trees till late 
in the fall and the early appearance of freezing weather whicb 
soon followed a cold wet season. 
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