New YORK AGRICULTURAL EXPERIMENT STATION. 247 
TasLe IV.— YieELtp By Sertes AT RIVERHEAD IN 1903. 


SERIES. Rows. Dates of spraying. Yield per acre. 
Bu. lbs. 
i cea Peaeand tO, en Jie, o-) uly, 22, and AUugusteie scum ees els ceve 246 45 
20 ree Sore ana lis. oe fune 5, 24 suly’7; 22 and August 7! et. 263 10 
ag Ba ee 3, 6,9 and 12....} Not sprayed Sat des watch couplet oe Ratan eade Rais 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 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, practically nothing. 
RESULTS IN 1904. 
TABLE V.— YIELD BY SERIES AT GENEVA IN 1004. 


SERIES. Rows. Dates of spraying. Yield per acre. 
Bu. lbs. 
lee arc 1U ant lor July la,o7 and August 165.06 <.63 cos veo ec 344 30 
Ae Pak AERP Pea Moe iE Gerla Ulyes, Sa eAucuste 15 and 290. 8 ered. ce 386 40 
wet 0% 9, 
2and A INORESDLAV.CCiaters carn cine Leiceest ieesione «selec che 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. In both 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. 
Taste VI.— YreLp sy Series at RIVERHEAD IN 1904. 


SERIES. Rows. | Dates of spraying. Yield per acre. 
Bu. lbs. 
ip et eandelOreet line 14 uly ot and Austist|O, 1.2 secre. 257 58 
haere Peororands) unevied4 27, july le 20 Auen9 and: 22.-cwecnses 297 45 
igi ky MAIL soi, ae NOL: SPTa VEU ors, stv, syns vee ton ew cleo bs ane 201 — 25 

Gain due to spraying three times, 5614 bu. per acre. 
- Gain due to spraying six times, 964 bu. per acre. 
The larger yield on sprayed rows was due chiefly to partial pro- 
tection against flea beetles which were unusually abundant. Both 
