152 MINNESOTA STATE HORTICULTURAL SOCIETY. 



SPRAYING PREPARATIONS, ETC. 



FUNGICIDES. 



BORDEAUX MIXTURE A. 



Good stone lime (must not be air slaked) . . 4 pounds 



Copper sulphate (blue stone) 4 pounds 



Water 50 gallons 



This is the formula to use for general purposes. In making 

 slake the lime in a barrel and dilute to twenty-five gallons with 

 water. Dissolve the blue stone in twenty-five gallons of water and 

 pour the two solutions together at the same time into the spray 

 barrel, keeping the contents of all three well stirred. 



BORDEAUX MIXTURE B. 



Lime 2 pounds 



Blue stone 2 pounds 



Water 50 gallons 



This is one-half the strength of the regular Bordeaux and is 

 to be used in instances where mixture proves too strong. 



BORDEAUX MIXTURE C. 



Lime 4 pounds 



Blue stone 6 pounds 



Water 50 gallons 



This is the stronger Bordeaux mixture and may be used on dor- 

 mant trees or in sprayings for bitter rot if. desired. 



BORDEAUX MIXTURE AND PARIS GREEN. 



Use one pound of Paris green to 150 gallons of Bordeaux mix- 

 ture. Slake three pounds of lime with just enough water to make 

 a thin paste, mix the Paris green with this and add to the Bor- 

 deaux mixture. 



COPPER SULPHATE SOLUTION. 



Copper sulphate 4 pounds 



Water 50 gallons 



This solution is to be used only on dormant trees. 



POTASSIUM SULPHIDE SOLUTION. 



Potassium sulphide i pound 



Water 50 gallons 



AMMO'NIACAL CARBONATE OF COPPER. 



Copper carbonate 6 ounces 



Concentrated ammonia (26° Beaume) 3 pints 



Water 50 gallons 



To be used after the fruit has begun to mature in cases where 

 Bordeaux mixture would be objectionable. Dissolve the copper 

 carbonate in the ammonia and add to the water. 



