New York AGRICULTURAL EXPERIMENT STATION. 141 
rows. However, late blight must have appeared soon after July 
22; for under date of August 6, Mr. Downs wrote that the un- 
sprayed rows were badly blighted; and when we inspected the 
experiment on August 10, the unsprayed rows were dead, ap- 
parently having been killed by late blight. The, sprayed rows 
adjacent still retained about three-fourths of their foliage, the 
other one-fourth having been ruined by late blight, early blight 
and flea-beetles, chiefly the first. At the same time Mr. Downs’ 
other four sprayed fields were only moderately blighted while 
all unsprayed fields in the vicinity were dead. But it was a hard 
fight. It was necessary to spray between showers which were 
very frequent, often coming before the bordeaux had had a chance 
to dry on the foliage and then the work had to be repeated. 
Nevertheless, spraying proved highly profitable as will be shown 
presently. 
The test rows were dug on October 8, with the following 
results :34 , 
Second sprayed row on the east, 168614 Ibs. marketable tubers. 
Second sprayed row on the west, 164614 lbs. marketable tubers. 
Average of the two sprayed rows, 166614 lbs. marketable tubers. 
Middle unsprayed row, 120314 Ibs. marketable tubers. 
Yield per acre, sprayed, 334 bu. 24 lbs. marketable tubers. 
Yield per acre, unsprayed, 241 bu. 30 lbs. marketable tubers. 
Gain per acre, 92 bu. 54 lbs. of marketable tubers. 
The -yield of culls was 1914 bushels per acre for the sprayed 
and 1814 bushels for the unsprayed. 
On the test rows the loss from rot was inconsiderable, but in 
some other parts of the 31 acres a good deal of rot was found. 
Mr. Downs places the average loss from rot at about 50 bushels 
per acre. Notwithstanding this loss the total yield of marketa- 
ble potatoes on the 31 acres was about 10,000 bushels or an ayer- 
age of 322 bushels per acre—a very good showing indeed. 
The items of expense for spraying 31 acres eight times were 
' as follows: 
1705 pounds copper sulphate at 6c.................. $102 30 
SEMEL NC Due Oyesa diathis «i 4jo fais eh one Meee 7 43 
“A noteworthy feature of this experiment is the close similarity of yield 
on the two sprayed rows, the difference being only 40 pounds on rows 73. 
rods long. In the Malone experiment (p. 124) the difference was even less 
being only 5 pounds. ; 
