PREPARED BORDEAUX MIXTURE. 



Chas. D. Woods and H. H. Hanson. 



For many years prepared Bordeaux mixtures both wet and 

 dry have been on the market. As considerable dry mixtures 

 were used in Maine in 1907 and the question of ready to use 

 wet mixtures seemed to be more to the front than for several 

 years, samples of the principal mixtures were obtained and 

 analyzed for their copper content. The results are given in the 

 table which follows. 



TABLE SHOWING PERCENTAGES OE COPPER SULPHATE IN 

 PREPARED BORDEAUX MIXTURES. 



Station No. 



Brand 



Copper sulphate* 





Dry Preparations 



Per cent 



3412 



Leggetts Dry Bordeaux (Fungiroid) (1) 



51.5 



3423 



Leggetts Dry Blight Dust No. 2 (1) 



26.9 



3424 



Leggetts Dry Blight Dust No. 2 (1) 



28. 1 



3425 



Bowker's Boxal (2) 



42.0 



3427 



Sal Bordeaux (3) 



Wet Preparations 



37.9 



3426 



Bowker's Wet Bordeaux (2) 



7.9 



3415 



Bowker's Paste Boxal (2) 



21.6 



3413 



Blanchard's Lion Brand Bordeaux Mixture (4) 



17.5 



3414 



Swift's Bordeaux Mixture (5) 



76.5 



(1) Made by Leggett & Bro., New York.. 



(2) Made by Bowker Insecticide Co., Boston. 



(3) Made by Dust Sprayer Manufacturing Co., Kansas City, Mo. 



(4) Made by James A. Blanchard, New York City. 



(5) Made by Merrimac Chemical Co., Boston. 



*Crystalized copper sulphate carrying 5 molecules of water. 



