98 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
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From the above it appears that the expense of spraying was 81 
cents per acre for each application or $3.24 per acre for four ap- 
plications. | 
All three sets of test rows were dug with a potato digger on 
October 17 and 18 with the following results: 
West test—Rows 414 feet long by 3.1 feet wide; 33.94 rows 
per acre. 
Second sprayed row on the west, 252 lbs. marketable tubers. 
Second sprayed row on the east, 311 lbs. marketable tubers. 
Middle unsprayed row, 230 lbs. marketable tubers. 
Yield, sprayed, 159 bu. 14 lbs. marketable tubers per acre. 
Yield, unsprayed, 130 bu. 6 lbs. marketable tubers per acre. 
Gain, 29 bu. 8 lbs. marketable tubers per acre. 
There was no rot. The yield of small potatoes was 13% bu. 
per acre for the sprayed rows and 17%4 bu. per acre for the un- 
sprayed. 
Middle test—- Rows 1274 feet long by 3.1 feet wide; I1 rows 
per acre. 
Second sprayed row on the east, 764 lbs. marketable tubers. 
Second sprayed row on the west, 847 Ibs. marketable tubers. 
Middle unsprayed row, 546 lbs. marketable tubers. 
Vield, sprayed, 147 bu. 40 lbs. marketable tubers per acre. 
Yield, unsprayed, 100 bu. 6 lbs. marketable tubers per acre. 
Gain, 47 bu. 34 lbs. marketable tubers per acre. 
There was no rot. The yield of small potatoes was g bu. per 
acre for the sprayed rows and 12 bu. per acre for the unsprayed. 
East test— Rows 1274 feet long by 3.1 wide; II rows per acre. 
Second sprayed row on the east, 790 lbs. marketable tubers. 
Middle unsprayed row, 516 lbs. marketable tubers. 
Yield, sprayed, 144 bu. 50 lbs. marketable tubers per acre. 
Yield, unsprayed, 94 bu. 36 lbs. marketable tubers per acre. 
Gain, 50 bu. 14 lbs. marketable tubers per acre. 
