New York AGRICULTURAL EXPERIMENT STATION. 151 
were darker green and more vigorous than the unsprayed. As 
in the two previous experiments the gain from spraying was 
lessened by the frost. 
Mr. Cridler expresses the opinion that it pays to spray pota- 
toes, the oftener the better. 
The market price of potatoes at digging time was 40 cents per 
bushel. 
EXPERIMENT NO. 11. 
Conducted by J. E. Schenck, Jasper, Steuben County. Two 
and one-fourth acres of potatoes, variety Sir Walter Raleigh, 
were sprayed four times with a four-gallon compressed-air sprayer. 
One row 50 rods long was left unsprayed. 
The unsprayed row yielded 7 bushels, which is at the rate of 
126 bushels per acre; while the sprayed row next to it yielded 
9 bushels, or at the rate of 162 bushels per acre, making a differ- 
ence of 36 bushels per acre in favor of spraying. There was no 
rot of importance even on the unsprayed rows and there was no 
damage by bugs. 
The unsprayed row had just begun to show the effects of 
blight when the plants were killed by the early frost of Sep- 
tember 22. The fourth spraying was made only five days before 
this frost, consequently could not have done any good. The 
increased yield on the sprayed row should be credited to three 
Ssprayings instead of four. 
Price of potatoes at digging time, 35 cents. 
EXPERIMENT No. 12. 
Conducted by M. C. Hollenbeck, Jasper. About two acres of 
potatoes were sprayed once with a five-gallon compressed-air 
sprayer. Two rows 27 rods long, three feet apart, were left 
unsprayed for comparison. At digging time the two unsprayed 
rows yielded 12 bushels, or at the rate of 195 bushels 32 pounds 
per acre, while two sprayed rows nearby yielded 14 bushels, or at 
the rate of 228 bushels 8 pounds per acre. Therefore, the gain 
due to spraying was at the rate of 32 bushels 86 pounds per 
acre. 
As the potatoes were late-planted they were still growing 
when frost came on September 22. Although the unsprayed rows 
were not injured by bugs they were much inferior to the sprayed 
rows in appearance of the foliage. There was but little rot. 
