102 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
On August 22 there was not even a trace of late blight in this 
experiment. It seems. to have been lacking throughout the 
season. There was some early blight. Flea beetles were very 
numerous and destructive. “ Bugs,” also, were very trouble- 
some. Although the check rows were treated four times with 
paris green applied by means of a powder gun they were some- 
what more injured by “bugs” than were the sprayed rows 
which received paris green twice only. 
The items of expense for spraying 5 acres of potatoes 3 times 
were as follows: 
rro lbs, ‘copper sulphate @'6.G8 2700. DR, he ee oe $7.59 
130.1bs: Time! @ iE ivi don ba ie eats a ane en 1 CIOS ae 1.30 
5 lbs. iparis green @:25¢. 2.5) fi. eae i: alleen, So ae 1.25 
PIB. paris green vZ0E 14-5 obvi slisaecea’c wick nla y Galoe aie bends ene 30 
49 -hrs, labor, for man: @. 156; ...). 0% oar wie ha de ee 7 a0) 
16 ‘hfs.,labor for, horse: (@" 10@\') .0 95 4 oe ok ina chee ee 1.60 
Wear’ Olt SPrAver jl Sat eee Se re ey ce ee ee 2.00 
LOLA Les lace beoke Brae oie Godin ht oie Oe a) GA Thad aya sn cee ete ee $21.24 
The total expense of spraying was $4.24 per acre or $1.41 per 
acre for each application. The test rows were dug by hand on 
October 23 with the following results: 
Test No. 1.— The rows were 313 ft. long by 32 in. wide, 52.19 
tows being required to make an acre. The yields were as follows: 
Second sprayed row on the south, 169 lbs. marketable tubers. 
Second sprayed row on the north, 152 lbs. marketable tubers. 
Middle unsprayed row, 72 lbs. marketable tubers. ° 
Yield, sprayed, 139 bu. 36 lbs. marketable tubers per acre. 
Vield, unsprayed, 62 bu. 38 lbs. marketable tubers per acre. 
Gain, 76 bu. 58 lbs. marketable tubers per acre. 
There was no rot. The yield of small potatoes was at the 
rate of 21.3 bushels per acre for the sprayed rows and 30.4 
bushels per acre for the unsprayed. | 
Test No. 2.— The rows were 260 ft. long by 32 in. wide, 62.82 
rows being required to make anacre. The yields were as follows: 
Second sprayed row on the west, 131 lbs. marketable tubers. 
Second sprayed row on the east, 116 lbs. marketable tubers. 
Middle unsprayed row, 64 Ibs. marketable tubers. 
Yield, sprayed, 129 bu. 18 lbs. marketable tubers per acre. 
Yield, unsprayed, 66 bu. 59 lbs. marketable tubers per acre. 
Gain, 62 bu. t9 lbs. marketable tubers per acre. | 
