POTATO DISEASES AND THEIR REMEDIES. 



23 



Total yield of marketable potatoes from 2 rows sprayed. 



M^,!-^ 



Total yield marketable potatoes from 2 

 rows not sorayed. 





^^^s": 

 %^'^^ 





^^■* .'.>■•■■. 



■7 



J 



SPRAYED. NOT SPRAYED. 



Figure 5. Showing the benefit of sprajMng with Bordeaux mixture in prevent- 

 ing the late blight. The rows at the left were sprayed three times, t'hotographed 

 Sept. 10. 



First — As to relation of dale of digging to rot, the conclusions 

 reached in our experiments are that, if rot is feared, it is better 

 to delay digging until some ten days or more after the tops are 



