166 Report oF rue BoranicAL DEPARTMENT OF THE 
This was the first experience of the Messrs. Bradley with 
spraying potatoes, but they are well pleased with the results 
and will try it again. 3 
¥ 
EXPERIMENT NO. 29. 
Conducted by George W. Brown, Berkshire, Tioga County. 
In a five-acre field of potatoes about three-fourths of an acre was 
sprayed three times with an Auto-spray compressed-air sprayer. 
Two unsprayed rows eight rods long,.383 inches apart (exactly 
gv acre), vielded 110 pounds, or at the rate of 110 bushels per 
acre; while two sprayed rows only a few rows away, of the same 
length, on the same kind of soil and same variety (Carman No. 
3), vielded 200 pounds or at the rate of 200 bushels per acre. This 
makes the gain from spraying 9() bushels per acre. The average 
yield of the unsprayed portion of the field, which was all of the 
variety Carman No. 38, was about 100 bushels per acre. Some 
sprayed rows of Green Mountain in the same field yielded at the 
rate of 300 bushels per acre. 
The unsprayed rows were not injured by bugs but they blighted 
badly. They were all dead before September 1, while the sprayed 
rows, although affected, were not entirly dead until killed by 
frost. There was about three weeks difference in growth. 
About the same amount of rot was found on the sprayed rows 
as on the unsprayed. The difference in yield was mainly due to 
the increased size of the tubers on the sprayed rows. Price of 
potatoes, 40 cents. He 
EXPERIMENT NO. 30. 
Conducted by George W. Belden, Berkshire. One-half of a 
two-acre field of potatoes, variety Carman No. 1, was sprayed 
once with a Garfield knapsack sprayer. The unsprayed half of 
the field was treated three times with paris green, which kept 
bugs well under control. 
An unsprayed row 450 feet long yielded 420 pounds, or at the 
rate of 225 bushels 49 pounds per acre, while a sprayed row 
yielded 450 pounds, or at the rate of 241 bushels 57 pounds per 
acre, making a difference of 16 bushels 8 pounds per acre in favor 
of spraying. 
The unsprayed portion of the field was killed by blight and 
the sprayed portion, also, suffered considerably. The quantity 
