218 REPoRT OF THE BOTANICAL DEPARTMENT OF THE 
RESULTS IN 1903. 
Tapte IIJ.—Yreip sy Serizs at GENEVA IN 1903. 




Series. Rows. Dates of spraying. Yield per acre. 
. Bu. lbs. 
Leake Sk oe 1,4, 7,10 and 13.| July 14, 28 and Aug. 26....| 262 — 
fH BL oh Ee 2, 5, 8, 11 and 14.) July 7, 21, Aug. 7, 21 and 
Se Maen ae et 292 10 
1 8 NAA, ok p; 6, Of 12 and A. Net sprayed... 2.-op eek ey 174 20 
Increase in yield due to spraying three times, 88 bu. per acre. 
Increase in yield due to spraying five times, 118 bu. per acre. 
Three sprayings prolonged the life of the plants 11 days; 
five sprayings, 18 days. There was no early blight and the 
injury from flea beetles was only slight. Late blight was again 
the chief enemy. The loss from rot was even less than in 1902. 
TABLE IV.—YIELD BY SERIES AT RIVERHEAD IN 1903. 
= ted # Pees = 



Series. Rows. Dates of spraying. Yield per acre. 
, Bu. lbs. 
REN uP 1,4, 7and 10....| June 5, July 22 and Aug. 7. .| 246 45 
TL tos es he 2,90,8 and 11....| June-5, 24, July 7, 22 and ‘. 
Aue. “7 BA eee ere 263 10 
1th Senne | SO aha 1 2) Poh GNOt Bpraveds sak oeetie sie es Pr itr 10 




Increase in yield due to spraying three times, 394 bu. per acre. 
Increase in yield due to spraying five times, 56 bu. per acre. 
The sprayed rows outlived those unsprayed by several days. 
Late blight and flea beetles were the chief enemies. Early 
blight, also, caused slight damage. On the unsprayed rows 
the loss from rot was two per ct.; on those sprayed, practieally 
nothing. 
