New York AGRICULTURAL EXPERIMENT STATION, Zan 
TABLE XIV.—YIELD BY SERIES AT GENEVA IN 1908. 





Series. Rows. Dates of spraying. Yield per acre. 
Bu. lbs. 
LD hasan 1, 4, 7, 10 and 13.| July 3, 17 and Aug. 3...... 155 40 
ju 5 ee ae 2, 5, 8, ll and 14.| July 3, 17, Aug. 3, 18, Sept. 
ATG LOH hey | ce ia re 165 10 
14 A aa oa By 69,12 anailo.. NOt Sprayed oe ics oases ae 126 10 
pat Marketable tubers only. 
Increase in yicld due to spraying three times, 294 bu. per acre. 
Increase in yield due to spraying sia times, 39 bu. per acre. 
AT RIVERHEAD. 
The experiment at Riverhead was carried out in practicaily 
the same manner as the one at Geneva. There were fifteen 
rows 290.4 feet long by three feet wide. The seed tubers, which 
were of the variety Carman No. 1, were planted April 20 with 
a Robbins potato planter. The previous crop had been pota- 
toes. The soil was sandy loam and well drained. 
The five rows of Series I were sprayed three times—twice 
(June 11 and July 9) with bordeaux and paris green and once 
(Aug. 4) with bordeaux alone. They were also treated once 
(June 25) with paris green in lime water. 
The five rows of Series II were sprayed five times—three 
times (June 11, 25 and July 9) with bordeaux and paris green 
and twice (July 24 and Aug. 4) with bordeaux alone. 
The five rows of Series III (Check) were not sprayed at all 
with bordeaux, but were treated three times (June 11, 25 and 
July 9) with paris green in lime water to control bugs. 
The bordeaux mixture used was prepared in the same man- 
ner as in the Geneva experiment (see page 223). Whenever 
paris green was used it was applied at the rate of one pound 
to 50 gallons. All of the applications were made with a knap- 
sack sprayer and the work done very thoroughly. 
In this experiment there was some early blight and a mod- 
erate ists of flea beetles, but no late blight. The season 
