266 REPORT OF THE DEPARTMENT OF BOTANY OF THE 
The expense account contained the following items: 
g4Gh lbs. ‘copper -sulphate>(@, 8s. /. noe eee <span oe $27 20 
2: bbl, lime..@ Sx85ies. vob ise wateee os-e ee aetrap aaa: Cee eee 3 70 
68s lbs.,, paris .green@, 2c. . .s%.0¢ -+ shee s s+ on aus + De ee 19 04 
50 hrsalaborjfor.man |@ 20C...;> >see. «> eee see ee "10 00 
50 hrs. labor, for, horse \@. 20C.... +25 +s ++ ork) eee ees ee 10 00 
Wear of, sprayer. 5. sseorevse caer sci reoter teak -Men «ee 5 00 
Total cee eet 5 20 tiie cee teow REE Oo Sie wo ache ete eer ae aie ee $74 O4 
In both lots the test rows were of the variety Green Mountain. 
In Lot No. 1 the rows were 718 x 3 ft.; in Lot No. 2, 692 x 3 ft 
The yields were as follows: 
Lot. No. 1— Two sprayed rows, 1650 lbs.===278 bu. per acre. 
One of middle two check rows, 703 lbs.==236.9 bu. per acre. 
Increase in yield due to spraying; 41.1 bu. per acre. 
Lot No, 2.— Two sprayed rows, 956 lbs.=167.1 bu. per acre. 
One of middle check rows, 453 Ibs.==158.4 bu. per acre. 
Increase in yield due to spraying, 8.7 bu. per acre. 
Combining the results obtained in the two tests we find an aver- 
age gain of 24.9 bu. per acre. The market price of potatoes in 
Riverhead being 7244 cents per bushel!® at digging time the gain 
has a value of $18.05. After deducting the expense of spraying, 
$4.41 per acre, there remains a net profit of $13.64 per acre. 
THE SAGAPONACK EXPERIMENT. 
Conducted by Paul Roesel, Sagaponack, Long Island, who 
sprayed 34 acres of potatoes (variety, Green Mountain) ten times. 
The sprayer was a two-horse, five-row “ Brown” sprayer carry- 
ing one nozzle per row. The bordeaux used in this experiment 
was soda bordeaux (6 lbs. copper sulphate, 7% Ibs. sal soda and 
50 gals. water). There were two four-row checks. The sprayed 
portion of the field received two applications of paris green with 
bordeaux (3 lbs. to 50 gals.) in the first two sprayings and the 
checks, also, were treated with paris green twice (June 27 ,and 
* Seventy cents per bushel when the test rows in Lot No. 1 were dug and 
75 cents when those in Lot No. 2 were dug, making the average price 72% 
cents per bushel. 
