New York Agricultural Experiment Station. 99 
could follow either from the fruit, or the crop growing beneath the 
trees. 
On May 25, seven Rhode Island Greening apple trees were sprayed 
with solutions of this preparation, in three different degrees of strength, 
and the applications were repeated at the same rates on May 30. The 
fruits from these trees, and also from two check trees in the immediate 
vicinity not sprayed, were examined on October 7, from which it ap- 
peared that in 2,254 apples from the sprayed trees the per cent injured 
by the codling moth was almost exactly the same as in 1,408 apples 
from the check trees; in other words, the applications were entirely 
unavailing for the j>urpose intended. 
2. The Zoektein Poison. 
On June 4, three trees of the Rhode Island Greening apple were 
sprayed with the above at the rate of one ounce to ten gallons of water. 
Very little rain fell thereafter until June, by which time it was so late 
that the application was not repeated. 
On October 7, 1,244 aj>ples from the treated trees were examined, of 
which 421, or about thirty-four per cent, had been injured by the cod- 
ling moth. On the same day 746 apples were examined, from a check 
tree in the immediate vicinity, of which 358, or about forty-eight per 
cent had been injured by the same insect. As the latter percentage 
corresponds closely with that of the check trees in the preceding 
experiment, it is inferred that the application saved about fourteen per 
cent of the apples from injury. Had the trees been sprayed earlier, 
the benefit would probably have been greater, but as the insecticide 
did not reach the station until June 1, this was hardly possible. 
It should be added that at the rate used, the foliage was slightly 
injured. 
APPLICATIONS FOR THE PREVENTION OF APPLE SCAB. 
1. Hyposulphite of Soda. 
During the years 1885 and 1886* trials were made with hyposulphite 
of soda as a preventive of the disease known as scab in the apple, and 
due to a fungus named Fusicladimn dendriticum, Fckl. In the latter 
year the experiment was extended to a pear tree known to be much 
infested with an allied species of Fusicladium. All of these applica- 
tions appeared to prevent a part of the injury. 
The past season the trials have been repeated on a more extended 
*See Reports New York Agricultural Experiment Station, 1885, pp. 
231-2 ; 1886, pp. 177-8. 
