16 FUNGI AND FUNGICIDES. 



whitewash. Pour the whitewash very slowly through a wire 

 screen into the copper solution. Stir the mixture thoroughly, 

 and add enough water to make 50 gallons in all. Stir occa- 

 sionally while applying as a spray to the trees. 



In the preparation of the Bordeaux mixture it is necessary 

 that the ingredients should be mixed in a wooden vessel. If 

 an iron one is used the copper will go to the iron and the effect 

 of the spray be largely neutralized. 



Apply the wash cold and as soon as possible after it is 

 prepared. Never allow it to stand over night. 



AMMONIACAL COPPER CARBONATE SOLUTION. 



Copper carbonate . _'. ... 6 ounces. 



Ammonia . 3 pints. 



Water 50 gallons. 



Dissolve the copper carbonate in the ammonia and add the 

 water. 



Caution: Use np more ammonia than is required to dis- 

 solve the copper carbonate. Ammonia is variable in strength, 

 and the amount required must be tested in practice. 



POTASSIUM SULPHIDE SOLUTION. 



Potassium sulphide 1 ounce. 



Hot water 2 gallons. 



Dissolve the potassium in hot water, and use as a spray 

 when cold. 



EAU CELESTE SOLUTION. 



Copper sulphate 2 pounds. 



Ammonia 1 quart. 



Water. ._ .'. 50 gallons. 



Dissolve the copper sulphate in 6 gallons of water, using a 

 wooden vessel, then add one quart of ammonia and sufficient 

 water to make 50 gallons of wash. 



CORROSIVE SUBLIMATE SOLUTION. 



Corrosive sublimate 2^ ounces. 



Hot water 2 gallons. 



Dissolve the corrosive sublimate in the water, let it stand 

 for about 10 hours, and then add sufficient water to make 15 

 gallons of spray. 



