124 Report OF THE BOTANICAL DEPARTMENT OF THE 
THE MALONE EXPERIMENT. 
This experiment was conducted by Nelson W. Porter, Malone, 
N.Y. Eight acres of potatoes were sprayed seven times. Three 
rows 1452 feet long were left unsprayed for a check. 3 
The soil was sandy loam and the previous crop timothy hay. 
Five tons of high grade commercial fertilizer were used on the 
eight acres. The potatoes were of the variety Carman No. 3. 
They were planted May 27 five inches deep, 1814 inches apart in 
the row and the rows three feet apart. They were given six 
cultivations without any hilling and no hand hoeing except over 
a small area infested with quack grass. 
The spraying was done with a one-horse, four row “Iron 
Age” sprayer manufactured by the Bateman Manufacturing Co., 
Grenloch, N. J., (See Plate X, fig. 2.) The dates of spraying 
were July &, 18, 27, August 2, 15, 25 and 31. Paris green was 
used with the bordeaux in the first two sprayings at the rate of 
one and one-half pounds per acre. The unsprayed rows were 
treated with paris green on the same dates. 
Until well toward the close of the season there was no marked 
difference between the sprayed and unsprayed plants. On Sep- 
tember 9 the unsprayed plants were smaller and appeared less 
vigorous than the sprayed. They also showed some injury from 
early blight, but late blight was present only in small amount. 
Flea-beetles gave no trouble at any time. A few days before the 
plants were killed by frost on September 22 there was an out- 
break of late blight which damaged the unsprayed rows consider- 
ably but did not affect those sprayed. 
Considering that there had been so little blight until late in 
the season and no conspicuous contrast in appearance of the foli- 
age on sprayed and unsprayed rows it was not expected that there 
would be a. great difference in yield. Consequently it was a 
surprise to find that the sprayed rows outyielded the unsprayed | 
at the rate of 115 bushels per acre. (See Plate XI.) The test 
rows were dug by hand on October 5, the yields being as fol- 
lows: 
Second sprayed row on the north, 2017 pounds marketable 
tubers. 
