214 Report of the Botanical Department of the 



RESULTS IN 1905. 

 Table VII. — Yield by Series at Geneva in 1905. 



* Rows 1, 2 and 3 omitted because of error. 



Increase in yield due to spraying three times, 107 hu. per acre. 

 Increase in yield due to spraying five times, 119^ hu. per acre. 



From tlie combined attack of flea beetles, tip burn and late 

 blight the nnsprayed rows died fully two weeks earlier than the 

 sprayed ones. Spraying reduced the loss from rot at the rate of 

 41 bushels per acre. There was no subsequent rot in storage. 



Table VIII. — Yield by Series at Rjverhead ix 1905. 



Series. 



I 

 II 



in 



Rows. 



1, 4, 7, 10 and 13... . 



2, 5, 8, 11 and 14 



3, 6, 9, 12 and 15 



Dates of spraying. 



June 14, July 18 and Aug. II 



June 14, 30, July 14, 28 and Aug. II 

 Not sprayed 



Yield per acre. 



Bu. 



253 



221 



lbs. 



41 



38 



Increase in yield due to sprayiiig three times, 31i hu. per acre. 

 Increase in yield due to spraying jive times, 82 hu. per acre. 



Late blight caused no injury in this experiment and there was 

 not even a trace of rot. Flea beetles and early blight were the 

 enemies fought. 



