262 REPORT OF THE DEPARTMENT OF BOTANY OF THE 
The expense account contained the following items: 
175 lOs;;copper Stlphate ( OveC 2, cci eee ee $11 38 
LH Nig oye Arai ooursiie Sy PN er 4. GM gt gh AE hae Oe 115 
BBN bsedl “SOda (DBC aeee foie Casket ee ke cae 2 a 96 
Sribsh white arsenic’ (Se. Ny eis ss cake + oe ee eee 64 
1wsi4ehrs. labor. for: man) (@\20c.. 0). aan « &. ee 3 10 
1665 hrs: labor for: HOYSe W@, WOCts. dae 2500 eee I 55 
Witat) Of -SPrayeria. dus ss ce cic ck cn a an ania oe 10 00 
otal enc s Ave Sicakd nico a's wakes kein, « Smee On Sg SAR ean a $28 78 
In one. case the test rows were 1050 ft. x 37 in.; in the other 
934 it. x 37 in. The yields were as follows: 
Test No. 1— Two sprayed rows, 1526 lbs.=171 bu. per acre. 
Middle unsprayed rows, 554 lbs.=124.2 bu. per acre. 
Gain from spraying, 46.8 bu. per acre. 
Test No. 2.—Two sprayed rows, 1250 lbs.==157.5 bu. per acre. 
Middle unsprayed row, 477 lbs.=120.2 bu. per acre. 
Gain from spraying, 37.3 bu. per acre. 
Average gain in the two tests, 42 bu. per acre. 
At 50 cents per bushel the gain has a market value of $21. After 
subtracting the expense of spraying, $4.11 per acre, there remain¢ 
a net profit of $16.89 per acre. 
THE PLATTSBURGH EXPERIMENT. 
Conducted by Pardy Bros., Plattsburgh, N. Y. Eleven acres 
(variety unknown) were sprayed with» bordeaux mixture four 
times — July 16, 29, August 2 and about August 16. Before spray- 
ing was begun the entire field was treated (July 12) with arsenite 
of soda solution in lime water to control bugs. Further treatment 
for bugs consisted in the use of arsenite of soda with the bordeaux 
in three sprayings. The spraying was done with a two-horse, six- 
row “Aroostook” sprayer carrying one nozzle per row. The 
bordeaux was of the 66-50 formula. The water was pumped by 
hand and hauled about 100 rods. There were three check rows, 
354 feet long by 32 inches wide. These received three applications 
of poison (July 16, 31 and August 9); also the bugs were removed 
from them by hand once (August 2). The unsprayed rows died 
about a month earlier than the sprayed ones. The cause of this is 
not entirely clear. Unfortunately, the writers were unable to ex- 
amine the experiment during August and September. The un- 
sprayed rows were more injured by early blight and also by bugs 
