New York AGRICULTURAL EXPERIMENT STATION. 153 
o0 pounds paris ereen ati 18h Ct8.\y. cide serve sivecd eee s $5 50 
5 days’ labor for man and horse at $2.25............. 1t 25 
WY CAR OD SPLB VET. 42.155 5 sh0.0 viel 5's Dole tee ee eee ape 3 00 
1 Sala ae te 2 eata a abaya eee Bat hint Mie foal at ellie yan $42 65 

There were left unsprayed 12 short rows having an area of 42 
square rods, or a little more than one-fourth acre. These rows 
yielded 35 bushels of marketable tubers and 6 bushels of small 
and rotten ones. Twelve sprayed rows of the same length, and 
adjacent, yielded 43 bushels marketable tubers and 2 bushels 
small ones. These vields are at the rate of 1334 bushels per 
acre for the unsprayed and 1635-6 bushels for the sprayed, 
making a difference of 3014 bushels per acre in favor of spray- 
ing. ; 
The unsprayed rows were not injured by bugs but they were 
dead before frost came while the rest of the field was quite 
green when killed by frost September 22. A good many rotten 
tubers were found on the unsprayed rows but none on the 
sprayed. Mr. Babcock sold a large part of his crop for seed at 
50 cents per bushel. 
EXPERIMENT NO. 15. 
Frank Dobson of Charlotte, seven miles. north of Rochester, 
sprayed 41% acres of potatoes in two lots. A part of the pota- 
toes were in an apple orchard where three rows were left 
unsprayed. The others were in a young raspberry plantation, 
the raspberries being in rows five feet apart with potatoes 
planted between. In this case one row was left unsprayed. In 
the orchard the variety of potato was Michigan Snowflake, 
planted June 16; in the raspberry plantation, Rural New Yorker 
No. 2, planted June 20. 
The spraying was done with a home-made rig consisting of a 
one-horse two-wheeled cart, a fifty-gallon barrel with a Planet 
double-acting spray pump and two leads of hose.“ Three men 
were required to operate it—one on the cart to pump and drive 
and two others_on the ground to direct the spray nozzles. The 
dates of spraying were August 11, 23 and September 2. 
8 An illustration of Mr. Dobson’s outfit is shown in Bulletin 241 of this 
Station, Plate IX. 
if 
