216 Report of the Botanical Department of the 



RESULTS IN 1907. 

 Table XI. — Yield by Series at Geneva in 1907. 



Increase in yield due to spraying three times, 44 hu. per acre. 

 Increase in yield due to spraying five times, 73f hu. per acre. 



Late blight and rot were wholly absent and early blight ap- 

 peared only in traces. There was some tip burn and a light at- 

 tack of flea beetles. Considering the seemingly small amount of 

 damage done by blight and insects it is remarkable that spraying 

 should have increased the yield so much. 



Table XII. — Yield by Series at Riverhb:ad in 1907. 



Increase in yield due to spraying three times, 18 hu. per acre. 

 Increase in yield due to spraying six times, 31^ hu. per acre. 



There was some early blight, but no late blight. Flea beetles 

 were plentiful and caused much damage. The larger yield of the 

 sprayed rows is to be attributed to their partial protection against 

 flea beetles and early blight. 



