POTATO DISEASES IN I907. 



293 



The crop was harvested during the week beginning October 

 14. A summary of the yields and losses resulting from the use 

 of dust sprays, etc., as compared with the use of standard wet 

 bordeaux, are given in the following table. However, it should 

 be mentioned that this table, a record taken at digging time, 

 by no means represents the entire loss on the dusted plots. The 

 crop from these plots contained more undersized, immature 

 tubers and was in general of an inferior quality. Moreover, 

 Mr. Gilman informed the writer a month after the potatoes had 

 been placed in storage that those from the dust plots were show- 

 ing more or less decay while there was practically none in those 

 harvested from the plots sprayed with wet bordeaux. The rela- 

 tive net yields are shown graphically on page 294. 



Table showing total and net yields of potatoes per acre from the 

 use of different fungicides. 



Treatment. 



EJ2 -5 



p 'Z 





m 



>, 









0> 



a 





£> 











.«* 



c 



71 <a 







5£ 







CD 



» CD 



CU 



Z ft 



fteS 

 tn ri 



hi o 



Wet Bordeaux 



Sal Bordeaux, 6 lbs 



Wet Bordeaux 



Sal Bordeaux, 10 lbs 



Wet Bordeaux 



Cheek unspray ed 



Sodium Benzoate Bordeaux 

 Lefffrett's Blight Dust No. 2. 



Wet Bordeaux 



Bowkers Dry Boxal 



Wet Bordeaux 



Bowkers Boxal Paste 



Wet Bordeaux 



288 



IS 



ITS 



68 



312 



IS 



214 



57 



298 



28 



112 



95 



189 



59 



130 



62 



257 



18 



132 



74 



215 



13 



191 



48 



284 



25 



306 



5.9 





241 



28.2 



107 



330 



5.5 





271 



21.0 



66 



321 



8.7 





207 



45.9 



168 



248 



23.8 



91 



192 



32.3 



150 



275 



6.5 





206 



36.0 



148 



25S 



5.0 





239 



20.1 



89 



309 



8.1 





$53 50 



33 00 



84 00 

 45 50 

 75 00 



74 00- 



44 50 



*As compared with average net yield (280 bushels) of wet sprayed 

 plots 1, 3, 5, 9, 11 and 13. 



