SPRAY MATERIALS 135 



CARBOLIC ACID EMULSION. 



Hard soap 1 pound 



Crude carbolic acid 1 pint 



Hot water 1 gallon 



Dissolve the soap in the hot water and add the carbolic 

 acid. Churn the mixture until it becomes creamy and does 

 not separate. This is the stock solution. For use dilute 

 1 part of the emulsion to 30 parts of water. This spray is used 

 against the different kinds of maggots, the cabbage worms, 

 and other soft-bodied insects. 



Sprays for Plant Diseases.— The spray mixtures for the con- 

 trol of plant diseases differ from those used to kill insects. 

 The confusion which results over this question is oftentimes 

 detrimental to the growers. 



BORDEAUX MIXTURE. 



Copper sulphate 4 pounds 



Stone lime 4 pounds 



Water 50 gallons 



This mixture is known as the standard Bordeaux. Other 

 strengths are made by using a less amount of the copper 

 sulphate and the stone lime. To make Bordeaux mixture 

 dissolve the copper sulphate in several gallons of water 

 and then add enough water to make 25 gallons. Slake the 

 stone lime in about five gallons of water, and add enough 

 water to it to make the 25 gallons. When these solutions 

 are made pour both of them together into a barrel, and the 

 spray material is finished. 



Bordeaux mixture should not be made in metal vessels 

 because the copper acts upon the metal and soon destroys it. 

 Wooden vessels are best suited for making this material. 

 Bordeaux mixture should always be made fresh and sprayed 

 on the plant as soon as it is made. It loses much of its value 

 as a fungicide if it is allowed to stand very long before it is 

 used. 



Bordeaux mixture is one of the best fungicides we have, 

 and its place in horticulture is firmly established. 



SELF-BOILED LIME-SULPHUR MIXTURE. 



Stone lime 10 pounds 



Flowers of sulphur 10 pounds 



Water 50 gallons 



