) 
New York AGRICULTURAL EXPERIMENT STATION. 321 
sprayed with arsenate of lead, 0.5, showing a difference of 1.0 
per ct. more sound fruit by the use of arsenate of lead. With 
the fallen fruit the results of the two sprays are more marked ; 
for there is 16.4 per ct. wormy fruit from the trees treated with 
arsenite of soda as compared with 4.0: per ct. from the arsenate 
of lead applications, showing a difference of 12 per ct. in favor of 
the latter poison. In comparison with the checks which had 10 
per ct. of the fruit infested, there was, by using the arsenite of 
Soda, 8.5 per ct. less wormy apples (picked) and by the arsenate 
of lead 95 less wormy apples (picked). 
ORCHARD IX. (NIAGARA COUNTY.) PEARS. 
This orchard is located on the lake road about three miles 
north of Lewiston. It consists of 119 ten-year old pears, prin- 
cipally of the varieties Bartlett and Kieffer. The orchard has 
been given careful cultivation and was in an excellent condition. 
In 1903 the trees were subject to a light attack by the pear 
psyla. The scale has been present in the orchard for a number 
of years, but has been well controlled by the sulphur washes for 
the past two years. 
Conditions——The trees were sprayed April 21. The weather 
conditions were the same as given for Orchard VIII. The checks 
for this experiment were 200 trees in an immediately adjoining 
orchard. As the work was solely for the purpose of determining 
the value of the sulphur washes for the pear psylla the treatment 
was entirely restricted to these sprays. 
Results on pear psylla.—The psyllas were not numerous in 
these orchards at any time during the season. From April 30 
to June 3 there were more psyllas upon the checks than the 
sprayed trees, but by July 18 these differences had disappeared 
and all the trees were quite free of the insects. 
ORCHARD X. ‘(NIAGARA COUNTY.) PEARS. 
This orchard adjoins Youngstown. For the experiment 132 
eight-year-old pears, largely Bartletts, were given treatment and 
a like number of the same varieties were reserved as checks. 
The trees had been much neglected and were as a rule well 
infested with the scale. Last year more or less injury was done 
in this orchard by the pear psylia. 
reat 
