fungicides, because such combination can be applied more 

 economically. 



FUNGICIDES. 



Nothing has been discovered during the past year that is more 

 effective or better adapted to general use as a fungicide than the 

 Bordeaux mixture and the Ammoniacal Carbonate of Copper. 



Bordeaux ^fixture, 



Formula. 4 lbs. Copper Sulphate, {Blue Vitriol) 

 4 lbs. Caustic Lime (Unslaked Lime). 



Dissolve the Copper in hot water. (If suspended in a basket or 

 sack in a tub of cold water it will however dissolve in from two to 

 three hours.) 



The Lime is then slaked in another vessel adding water slowly that 

 it may be thoroughl}^ slaked. When both are cool, pour together, 

 straining the lime through a fine mesh sieve or burlap strainer, and 

 thoroughly mix. Before using, add water enough to make 



(A) 25 gallons of the mixture or 



(B) 50 " " " " 



The active agent in this 'mixture is the copper, the lime being 

 used simply to hold it in place upon the foliage and branches of 

 the plants sprayed. Here it is given up gradually, destroying the 

 spores of the fungi as they are brought in contact with it by the sur- 

 rounding atmosphere. 



Should the lime be air slaked, more than four pounds may be 

 needed as it will have lost much of its strength. To test this, dis- 

 solve a little ferrocyanide of potassium (yellow prussiate of potash) 

 in a small bottle and after the Bordeaux mixture has been prepared 

 pour a few drops of the ferrocyanide solution into it. If a brown 

 precipitate is made, add more lime until no reaction takes place, when 

 the mixture is neutral or alkaline and will not injure the foliage of 

 delicate trees like the peach and cherry. 



Ammoniacal Carbonate of Copper. 



Formtda. 3 oz. Carbonate of Copper. 



Liquid ammonia enough to dissolve the Copper, 

 which will be about 3 qts., varying somewhat 

 according to its strength. 



