108 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
There was no rot. The yield of small potatoes was at the rate of 
15.7 bu. per acre on the sprayed rows and 18.1 bu. per acre on the 
unsprayed. © 
Lot III.— The test rows were 686 ft. long by 3 ft. wide, 21.16 
rows being required to make an acre. There.is some doubt regard- 
ing the accuracy of the yields given below. No representative of 
the Station was present when the potatoes were dug and stored. 
About a month later when the weights were taken no one but the 
hired man knew how the potatoes were arranged. With so much 
late blight as there was in this lot it would seem that a larger gain 
in favor of spraying might be expected. The yields were as follows: 
Two sprayed rows, 948 Ibs. marketable tubers. _ 
Middle two unsprayed rows, 909 lbs. marketable tubers. 
Yield, sprayed, 167 bu. 10 lbs. marketable tubers per acre. 
Yield, unsprayed, 160 bu. 17 lbs. marketable tubers per acres 
Gain, 6 bu. 53 lbs. marketable tubers per acre. 
The average gain in the three tests was 7 bu. 28 lbs. marketable 
tubers per acre. At 55 cents per bushel, the market price at digging 
time, the value of the gain would be $4.10 per acre. After deducting 
$3.44, the expense of spraying, there remains a net profit of 66 
cents per acre. 
THE SAGAPONACK EXPERIMENT. 
This experiment was conducted by Paul Roesel, Sagaponack, 
Long Island. Mr. Roesel sprayed 21 acres of potatoes, of the 
variety Green Mountain, ten times with a two-horse, five-row 
Brown potato sprayer carrying one nozzle per row. 
The bordeaux used in this experiment was what is known as — 
soda bordeaux, because the copper sulphate is neutralized with sal 
soda instead of lime. It was prepared by the following formula L 
Copper) sulphate: d eee a Pe a i ae Se ee 6 pounds 
salvsoda Washing) soda) abo gel ae te eh ek 714 pounds 
AV GR ae ih ph eG Ni AS 20. aie ae ge 50 ~—s gallons 
Water for preparing the bordeaux was obtained from a well at 
one side of the field. One man drove the sprayer while another 
pumped water and prepared the bordeaux. The quantity of bor- 
deaux applied averaged about fifty gallons per acre in each spray- 
ing. The time required to spray the 21 acres varied from 7% to 9 
hours. The dates of spraying were as follows: June 21, 25, 29, 
July 5, 10-11, 16-17, 23, 26, 31 and August 4. Paris green for 
