New York Agricultural Experiment Station. 219 



KESULTS IN 1910. 

 Table XVII. — Yield by Series at Geneva in 1910. 



Increase in yield due to spraying three tbties, 22 hu. per acre. 

 Increase in yield due to spraying six times, 63 bu. per acre. 



A very little damage was done by flea beetles and early blight. 

 The chief factor was late blight which appeared about the middle 

 of September and wrought considerable havoc in the north one- 

 third of the field. In this region there was, also, some loss from 

 rot — 43 bu. per acre on Series I, 10.8 bu. on Series II and 37.2 

 bu. on Series III. 



Table XVIIl. — Yield by Series at Riverhead in 1910.* 



* Incorrectly reported in Bulletin 338. Rows 1, 2 and 3 should have been excluded because of 

 their irregular yields due to some other cause than spraying. 



Increase in yield due to spraying three times, 141 hu. per acre. 

 Increase in yield due to spraying five times 25^ hu. per acre. 



The plants suffered severely from drought and were moderately 

 attacked by flea beetles, plant lice and early blight ; but late blight 

 and rot were wholly absent. 



