214 AGRICULTURE 



Paris green is mixed to paste form in a small quantity of 

 water, and then added to the water. 



Use. Paris green may be used in combination with 

 the Bordeaux mixture, but not with lime-sulphur. When 

 mixing it with Bordeaux, the Paris green should be com- 

 bined with the diluted lime before it is brought in contact 

 with the copper sulphate. 



5. Kerosene Emulsion 



Kerosene is one of the best of contact insecticides. A 

 small particle of it on any part of the body means certain 

 death to any insect. Pure kerosene, however, will injure 

 most plants, and hence must be used in a mixture. The 

 best of these is what is known as kerosene emulsion. 



Composition. The formula for the mixture commonly 

 used is : 



Vz pound hard laundry soap shaved fine. 



1 gallon of soft water. 



2 gallons of kerosene. 



Making the emulsion. One of the advantages in the 

 use of this spray is the ease with which it can be made. 

 Dissolve the soap in one gallon of boiling water; remove 

 from the stove and at once add two gallons of kerosene. 

 Stir while cooling until a soft, butter-like mass is obtained. 

 Dilute one part of this stock solution with ten or twelve 

 parts of water as needed for spraying. 



Use. Kerosene emulsion may be used on all kinds 

 of tender foliage without injury. It will control the vari- 

 ous kinds of plant lice, slugs, etc. 



6. The Resin-Lime Mixture 



One of the difficulties in using many of the insecticides 

 and fungicides is that they do not adhere well to the smooth 

 foliage of the plants. The resin-lime mixture is often used 



