New York AGRIcuLTURAL ExprRIMENT SratTIoON. 343 
previous pages of this Report. In the former instance the in- 
secticide was successfully used against a flea beetle, Systena 
hudsonias Forst. attacking young apple grafts, and in the latter 
with equal success against the cottonwood leaf beetle, Lina 
scripta Fab. | | | 
In the spring of 1896, and again in 1897, the writer used green 
arsenite against the spring canker worm in an orchard near the 
Station.. Fourteen large bearing apple trees were used in the 
experiments. Both seasons the trees were sprayed three times, 
the first being about the middle of May and the remaining two 
from a week to ten days apart. In 1896 the remainder of the 
infested orchard was sprayed with ordinary Paris green, and in 
1897 the green arsenite alone was used. In 1896, the trees 
sprayed with green-arsenite were more uniformly free from 
canker worms than those sprayed with Paris green, while in 1897, 
the sprayed trees were practically free from canker worms after 
the second application, which was made May 22, while the un- 
sprayed trees were nearly stripped of their foliage. 
In addition to the above experiments the writer has used green 
arsenite upon young pear trees against the fruit worm and upon 
potatoes against the Colorado potato beetle. In both instances 
the poison was used at the rate of 1 pound to 150 gallons of 
water with the addition of enough freshly-slaked lime to make the 
mixture slightly milky in appearance, and gave every indication 
of being equally as efficient as Paris green. __ 
