New York AGRICULTURAL EXPERIMENT STATION. 159 
earlier ones. Another field of eight acres given a single appli: 
cation on this date did not blight at all. 
Mr. Battams is of the opinion that one or two more sprayings 
following the third one would have been highly profitable, but at 
the time he feared that further spraying would do more harm 
than good owing to the breaking of the large vines by driving 
through them. He regards spraying as an essential factor in the 
production of large crops. 
When the unsprayed rows died the twice-sprayed rows were 
only half-dead and the three-sprayed rows were still in full foliage. 
The latter outlived the unsprayed rows by three weeks. There 
was no rot and the unsprayed rows were not injured by bugs. 
Market price of potatoes at digging time, 45 cents. 
EXPERIMENT NO, 21. 
Conducted by Charles IK. Green, Victor, Ontario County. Mr. 
Green sprayed fourteen acres of potatoes eight times between 
July 15 and September 1. The work was done with a home- 
made outfit consisting of a two-wheeled cart carrying a Spramotor 
spray pump mounted in a barrel and rigged to cover four rows 
at a time with one Vermorel nozzle per row. The outfit was 
drawn by one horse, and one man dd both pumping and 
driving. 
One acre of the potatoes was in a young pear orchard set in the 
spring of 1904. Between the rows of trees there were eight strips 
of potatoes of four rows each and these were sprayed. Potatoes 
were planted also in the rows with the trees and these were not 
sprayed. Accordingly, there were 32 sprayed rows and eight 
unsprayed rows in the orchard. 
At digging time the yield on the sprayed and unsprayed rows 
was measured. Making due allowance for space occupied by the 
trees in the unsprayed rows, the yield was at the rate of 1380 
bushels per acre, while the sprayed rows yielded at the rate of 200 
bushels per acre. Thus the gain from spraying was 70: bushels 
per acre. . 
The difference in growth was remarkable. The sprayed rows 
were finally killed by frost October 15 after having outlived the 
unsprayed rows about five weeks. There was but little rot on 
either the sprayed or unsprayed. Price of potatves, 40 cents. 
