l6 SPRAYING CROPS 



adding 2 gallons of kerosene to i gallon of a solution 

 made by dissolving l / 2 pound of hard soap in I 

 gallon of boiling water, and churning the mixture by 

 forcing it back into the same vessel through a force 

 pump with a rather sm^ll nozzle opening throwing a 

 straight stream, until the whole forms a creamy mass, 

 which will thicken into a jelly-like substance on cool- 

 ing. The soap solution should be hot when the 

 kerosene is added, but of course must not be near a 

 fire. The emulsion thus made is to be diluted before 

 using, with nine or ten parts of water to one part of 

 emulsion. The amount of dilution varies with differ- 

 ent insects. Soft water or rain water should be used 

 in diluting. If this cannot be obtained add a little 

 lye or bicarbonate of soda. For use against scale 

 insects potash whale oil soap is recommended. 



Crude Petroleum This substance has been used 

 to a considerable extent for winter treatment for 

 the San Jose scale. It is sprayed upon the bark as 

 recommended for pure kerosene and seems to remain 

 on longer in effective condition. 



Lime, Salt and Sulphur Wash This has lately 

 become the most generally recommended insecticide 

 for use against the San Jose scale. According to 

 Professor J. B. Smith the formula generally used in 

 New Jersey is : 



Stone lime 50 pounds 



Flowers of sulphur 50 pounds 



Stock salt 50 pounds 



Water 150 gallons 



"Slake the lime with hot water, enough to do it 

 thoroughly, add the sulphur, stir well, and boil for 

 at least an hour, adding water as necessary. Then 

 add the salt, boil at least fifteen minutes more, and 

 dilute to make the 150 gallons, In boiling .use no 



