New York AGRICULTURAL EXPERIMENT STATION. 133 
sprayed row on one side and the first sprayed row on the other 
side. The yields were as follows: 
Second sprayed row on the west, 326 lbs. marketable tubers. 
First sprayed row on the east,” 196 lbs. marketable tubers. 
Average of two sprayed rows, 261 lbs. marketable tubers. 
One of the middle two unsprayed rows, 169 lbs. marketable tubers. 
Vield, sprayed, 133 bu. 46 lbs. marketable tubers per acre. 
Yield, unsprayed, 87 bu. 37 lbs. marketable tubers per acre. 
Gain, 46 bu. 9 Ibs. marketable tubers per acre. 
Spraying increased the yield at the rate of 52.5 per ct. 
The yield of small potatoes or culls was at the rate of 59 bu. 
58 lbs. per acre for the sprayed and 52 bu. 17 lbs. per acre for 
the unsprayed, making a difference of 7 bu. 41 lbs. per acre in 
favor of the sprayed. Usually the greater yield of culls is on the 
unsprayed rows. 
There was no loss from rot either on the sprayed or on the un- 
sprayed rows. 
At 60 cents per bushel, the market price of potatoes in Gowanda 
at digging time, 46 bu. 9 Ibs. of potatoes would be worth $27.60. 
Substracting $3.76, the cost of spraying per acre, we have left a 
net profit of $23.93 per acre. 
THE GAINESVILLE EXPERIMENT. 
This experiment was made by Brainerd & Beaurhont, Gaines- 
ville, Wyoming county, who conducted a similar experiment for 
the Station in 1904. A field of sixteen acres (variety, Sir Walter 
Raleigh and Carman No. 3 mixed) was sprayed seven times on 
the following dates: June 29-30, July 7-8, July 14-15, August 2, 
10, 16 and 26. The sprayer used was the “Aroostook” power 
sprayer covering 5 rows at each passage.’* Poison (arsenite of 
soda) was used with the bordeaux in the first five sprayings. 
Five rows 240 feet long were left unsprayed. Although paris 
green was applied to these rows on the same dates that poison was 
used on the sprayed rows and twice more, between times, bugs 
caused slightly more damage here than on the sprayed rows. It 
™ As a general rule the second rather than the first sprayed row should be 
used, but it was not possible in this case as the second sprayed row had been 
dug previously by mistake. 
“For an illustration of the sprayer used in the Gainesville experiment see 
Bulletin 264, Plate VII, tig. 1. 
