122 MAINE AGRICULTURAL EXPERIMENT STATION. 1908. 



These experiments indicate that wet ready-to-use Bordeaux 

 mixture cannot be depended upon to prevent blight unless used 

 in quantities much larger than the directions call for and that 

 dry Bordeaux mixtures are not nearly as effective as wet 

 Bordeaux. 



COPPER CONTENT OP PREPARED COMPARED WITH REGULAR 

 BORDEAUX MIXTURE. 



As may be noted in the table on page 120 prepared wet Bor- 

 deaux mixtures differ greatly in the amount of copper they carry. 

 Even if they are equally efficient, in comparing their cost with 

 that of freshly prepared Bordeaux mixture, the amount of cop- 

 per carried must be taken into account. The following table 

 shows the number of pounds of each that needs to be taken to 

 furnish an amount of copper equivalent to that furnished by a 

 barrel of Bordeaux mixture made up from 5 pounds of copper 

 sulphate, 5 pounds of lime and 50 gallons of water. 



TABLE SHOWING POUNDS OF DIFFERENT PREPARED BORDEAUX 

 MIXTURES EQUIVALENT TO A BORDEAUX MIXTURE CARRYING 

 5 POUNDS COPPER SULPHATE. 



4 • ■ 



Brand. 



Pounds equal to 5 



pounds copper 



sulphate. 



Dry Preparations. 





Leggetts Dry Bordeaux (Fungiroid) 



9.7 



Leggetts Blight Dust No. 2 



IS. 2 



Bowker's Dry Boxal 



11.9 



Sal Bordeaux 



13.2 



Wet Preparations. 





Bowker's Wet Bordeaux 



63.3 



Bowker's Paste Boxal 



23.1 



Blanchard's Lion Brand Bordeaux 



28.2 



Swift's Bordeaux Mixture 



6.5 



MONEY VALUE PER POUND OF PREPARED COMPARED WITH 

 REGULAR BORDEAUX MIXTURE. 



The cost of preparing fresh Bordeaux mixture in 10 barrel 

 lots does not exceed 75 cents a barrel, taking cost of materials 

 and time of preparation into account, and it can probably be 



