New York AGricuuTuRAL EXPERIMENT STATION. 155 
Brown Siphonette purchased for use in the orchard. The 
sprayer was run at a pressure of 50 to 75 pounds. 
The soil being rich and well cultivated the vines grew very 
rank. Consequently, blight was severe. On August 6 the 
unsprayed rows were showing signs of blight and by August 27 
they were entirely dead. On the latter date the whole field was 
showing some blight but the unsprayed rows were in so much 
worse condition than the sprayed that from a distance it looked 
as if there was a road across the field. (See Plate XIV, fig 1.) 
The four unsprayed rows yielded 15 bushels of marketable 
tubers and 5 bushels of small ones; while the four sprayed rows 
next to them yielded 40 bushels of marketable tubers, 3 bushels 
of small ones and 2 bushels of sunburned tubers. These yields 
are at the rate of 270 bushels 54 pounds per acre for the 
sprayed plants and 7414 bushels for those unsprayed, making 
the gain due to spraying 196 bushels 24 pounds of market«ble 
tubers per acre. In reality the gain was greater than this. The 
two bushels of sunburned tubers were of marketable size and 
should be credited to the sprayed rows because it was no fault 
of the spraying that they were sunburned. The potatoes had 
been planted shallow and no hilling done. If we class the sun- 
burned tubers as marketable the gain due to spraying was at 
the rate of 10 bushels per acre. With the exception of the 
ten-year experiment at Geneva, where the gain was at the rate 
of 233 bushels per acre (See page 100), no other experiment 
in 1904 gave as large returns for spraying. There is good 
reason to believe that practically all the increased yield on the 
sprayed rows was due to spraying. Bugs propably injured 
the unsprayed rows slightly more than the sprayed, but if so 
the difference must be credited to the bordeaux as no poison 
was used on either the sprayed or unsprayed. There was but 
little rot on either the sprayed or unsprayed rows: 
The items of expense were as follows: 
158 pounds copper sulphate at 61% cents.............. $10 27 
RE Sree ess NRE SALT oi nto: = o> gow aR eres areata CEN 1 00 
41 hours labor for man and horse at 25 cents.......... 10 25 
EMMERICH VO ee Te icee a ee fais sts tls. e t'sba chocatete se ert > 2 00 
UMeieig? 2a ies ss 7 cee aU hee Oe eae an ae a $23 52 
Price of potatoes at digging time, 40 to 45 cents. 
