New York AGRICULTURAL EXPERIMENT STATION. 121 
There was no loss from rot even on the unsprayed rows. 
Experiment No, 13.—The yields given in Table XVI are the 
average of two tests. In one test the yields were as follows: 
Two sprayed rows, 1,368 Ibs. = 293 bu. 6 lbs. per acre. 
Two unsprayed rows, 895 Ibs. = 191 bu. 45 lbs. per acre. 
Gain, tor bu. 2r lbs. marketable tubers per acre. 
In the other test the yields were as follows: 
Two sprayed rows, 703 Ibs. = 246 bu. 24 lbs. per acre. 
Two unsprayed rows, 515 lbs. — 180 bu. 30 lbs. per acre. 
Gain, 65 bu. 54.lbs. marketabie tubers per acre. 
In both tests the sprayed rows outlived the unsprayed ones about 
two weeks. 
The items of expense for spraying 16 acres 7 times were as 
follows : 
Rn mee Ceee SUTNALGT. ti. 1)lt arate. chin i Th baw os elke Roe Glee $49.84 
MMR INEIIIME eRnerg OPE eM a RNY Sale ie Go's) siulicts claveon he ¥elecele 7a 
EM EE a We Le ie el cGatc Outed hata: ave’ sic v vinipne Ss od @ Bice e este ees 33.60 
rE ene tee ean. ave mans tee oat AN ECA Sa INES $90.56 
Mr. Sager considers that the expense of at least two sprayings 
should be charged to the “ bugs.” 
A representative of the Station made a brief examination of this 
experiment August 30. We are of the opinion that the premature 
death of the unsprayed rows was due chiefly to late blight and flea 
beetles. 
Experiment No. 14.—Altogether 32 acres were sprayed but the 
test rows were in a two-acre field at some distance from the other 
30 acres. For spraying 32 acres 7 times 550 lbs. of copper sulphate 
and 5 bbls. of lime were required. The two-acre field in which the 
test was made contained 61 rows. The yield of 60 rows (58 sprayed 
and 2 unsprayed) was 22,340 lbs., which is at the rate of 189 bu. 
6 lbs. per acre; while the yield of the middle unsprayed row was 
208 Ibs. or 105 bu. 44 lbs. per acre. 
When we examined this experiment on July 19 the unsprayed 
rows were already so much affected with late blight that they 
were readily distinguishable from the sprayed rows throughout 
their whole length. 
Experiment No. 15.— There were four unsprayed rows which 
. were treated with poison in water at the same time that the 
