NEw York AGRICULTURAL~ EXPERIMENT STATION. 71 
TABLE I1V.—YIELD By SERIES AT RIVERHEAD IN 1903. 


Series. Rows. Dates of spraying. | Yield per acre. 
Naa pees Ibs. 
eis ot, 5-3 Tiree pater lO. vie. yp ehunelo, july 2e and Aug. Fino ce} 246 45 
{Ue a ee am Ome SeuINCe Ldee ay ae June 524 Jaly- 7, 22°andi Aue 7. ia -6)" 263 10 
1 LIE see So a SajGx9 amd sh), <0 .)2 Not sprayed | 207 10 


Gain due to spraying three times, 39% bu. per acre. 
Gain due to spraying five times, 56 bu. per acre. 
The sprayed rows outlived the 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 2 per ct.; on the sprayed, practically nothing. 
RESULTS IN I9Q0O4. 
Taste V.—YIELD BY SERIES AT GENEVA IN 1904. 


Serie . Rows. Dates of spraying. Yield per acre. 
3 Bu. lbs. 
eet oo, | iA Onanidrio sah Neil ye towes and Atre.pL bh. Malka sta % 344 30 
ib oie eae Oms Mander aa ayes Oo eAae Wl and 29 20. yaar 386 40 
LODE See oe ee Oe POGOe oon Mee IN OUGTITE VeCioris | hi oe ee ee 153 25 

Gain due to spraying three times, 191 bu. per acre. 
Gain due to spraying five times, 233 bu. per acre. 
Spraying prolonged the life of the plants 25 days. Late blight 
was the only trouble. Both on sprayed and unsprayed rows there 
was a little rot at digging time. In storage, the sprayed potatoes 
rotted most. Spraying materially improved the cooking qualities. 
TABLE VI.—YIELD BY SERIES AT RIVERHEAD IN IQO4. 
sti i 

Series. Rows. Dates of spraying. Yield per acre. 
my Bu. Ibs. 
1p Re es Iida toand «lO Waa. Junei4eualy Zinand Avie yor. eek Aor 58 
1D een Cae ae Pa tse, eyes uC baal il ean. June 14, 27, July 11, 26, Aug. 9 and 22!) 297 45 
UPSD iets thse 45-2) 5 ts Suonorand 1255 o/s IN@tySPTa Ve Gin SON ae aieus eset la pees anaes 6 201 25 

Eel 
Gam due to sprayuig three times, 56% bu. per acre. 
Gain due to spraying six times, 961% bu. per acre. 
The larger yield on sprayed rows was due chiefly to partial 
protection against flea beetles which were unusually abundant. 
