INSECTICIDES 487 



sions is frequently indicated by the percentage of oil in the 

 diluted liquid : 



P^'or a 10 per cent emulsion add 17 gal. water to 3 gal. stock emulsion. 

 For a 15 per cent emulsion add 10^ gal. water to 3 gal. stock emulsion. 

 For a 20 per cent emulsion add 7 gal. water to 3 gal. stock emulsion. 

 For a 25 per cent emulsion add 5 gal. water to 3 gal. stock emulsion. 



Distillate Emulsion 



Distillate emulsion is widely used in California. 



Distillate (28° Beaume) 20 gallons 



Whale-oil soap 30 pounds 



Water 12 gallons 



Dissolve the whale-oil soap in the water, which should be 

 heated to the boiling point, add the distillate and agitate thor- 

 oughly while the solution is hot. For use add 20 gallons of 

 water to each gallon of the stock emulsion. 



Carbolic Acid Emulsion 



This spray is used in California for mealy bugs, plant-lice 

 and the soft brown scale. 



Whale-oil soap 40 pounds 



Crude carbolic acid 5 gallons 



Water 40 gallons 



Dissolve the soap completely in hot water, add the carbolic 

 acid, and heat to the boiling point for 20 minut(»s. For use 

 add 20 gallons of water to each gallon of stock c^mulsion. 



MisciBLE Oils 



There an^ now on the niark(^t a number of conccMitrated oil 

 ennilsions, known as s()lul)le or miscible oils, int(Mided primarily 

 for use against the San Juse scale. For tliis i)urpuse they are 



