172 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
In the 25 unsprayed hills there were 3 pounds of rotten tubers, 
but none whatever in the sprayed hills. The unsprayed rows 
were not injured by bugs. Market price of potatoes at digging 
time, 90 cents per barrel or 30 cents per bushel. 
EXPERIMENT NO. 387. 
Conducted by D. Lewis Downs, Baiting Hollow, Long Island. 
Thirty-five acres of potatoes, variety Green Mountain, were 
sprayed four times, eight rows six times and 25 rows 49 rods 
long, 384 inches apart, left unsprayed except that they were treated 
twice with poison for bugs. 
The spraying was done with a one-horse Watson sprayer cover- 
ing four rows at a time with one nozzle per row. The total 
expense of spraying, including all labor, chemicals, paris green 
and wear on sprayer was $3.80 per acre or 95 cents per acre for 
each spraying. Mr. Downs thinks that with experience he can 
reduce this somewhat. 
The yields were as follows: 
Hight rows sprayed six times, 105 bushels or at the rate of 249 
bushels 85 pounds per acre. 
Hight rows sprayed four times, 101 bushels or at the rate of 240 
bushels 4 pounds per acre. 
Hight rows unsprayed, 83 5-6 bushels or at the rate of 199 
bushels 16 pounds per acre. 
Thus the gain from four sprayings was 4034 bushels per acre 
and from six sprayings 501-3 bushels. 
As the test rows were dug the potatoes were hauled directly to 
the railroad station where they were weighed and sold. Accord- 
ingly, the yields given above are based on actual selling weight. 
The eight six-sprayed rows measured were separated from the 
eight unsprayed rows by only two rows, while the eight rows 
sprayed four times adjoined the six-sprayed' rows and were about 
28 feet from the unsprayed rows. There was not much rot on 
the sprayed rows, but the unsprayed rotted badly. 
When digging was commenced potatoes sold for 40 cents 
per bushel, but by the time it was finished the price had risen to 
60 cents. 
EXPERIMENT No. 88. 
Conducted by F. N. Moseley, Riverhead, Long Island. In a 
field of eleven acres of potatoes about nine acres were sprayed 
