204 SCHOOL AND HOME GARDENS 



HOW TO PREPARE CONTACT INSECTICIDES 



Kerosene emulsion. In half a gallon of boiling water 

 dissolve a quarter of a pound of hard soap shaved fine. 

 Remove from the fire and pour in one gallon of kero- 

 sene. Shake the mixture vigorously at once or churn 

 it with a spray pump until a creamy emulsion is formed. 

 For summer use add one part to nine parts of soft water, 

 or one to seven for winter use. 



Kerosene and milk emulsion. Sour milk, one pint ; 

 kerosene oil, one quart. Warm to blood heat and mix 

 thoroughly. Dilute twenty times with water. 



Carbolic acid emulsion. To one pound of hard soap 

 dissolved in one gallon of boiling water add one pint of 

 crude carbolic acid and emulsify by shaking vigorously 

 or churning with a spray pump. For cabbage maggots 

 and other root insects use one part emulsion in thirty 

 parts of water. 



Whale-oil soap. Dissolve half a pound of whale-oil 

 soap, shaved fine, in one quart of hot water ; then add 

 five gallons of cold water and apply it with a garden 

 sprinkler. A thick solution may be smeared on the 

 trunks of trees to keep worms from crawling up. 



Soap solution. Dissolve a quarter of a pound of soap 

 in two gallons of water. This may be used for plant 

 lice or for scale on house plants. 



Lime-sulfur. Slake twenty pounds of fresh-burned 

 lime ; add fifteen pounds of sulfur. Boil in twenty-five 

 gallons of water for one hour. This spray must be used 



