New York Agricultukal Experiment Station. 213 



RESULTS IN 1904. 

 Table V. — Yiei.d by Sebies at Geneva in 1904. 



Increase in yield due to spraying three times, 191 hu. per acre. 

 Increase in yield due to spraying five times j 233 hu. per acre. 



Spraying prolonged the life of the plants 25 days. Late blight 

 was the only trouble. On 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. 



Table VI. — Yield by Series at Riverhead in 1904. 



Increase in yield due to spraying three times, 56^ hu. per acre. 

 Increase in yield due to spraying six times, 96i hu. per acre. 



The larger yield on sprayed rows was due chiefly to partial 

 protection against flea beetles which were unusually abundant. 

 Both early and late blight were also present. The loss from rot 

 wasi 3 per ct. on Series I, 1 per ct. on Series II, and 6 per ct. on 

 Series III. 



