66 POISONS — FOR BITING INSECTS 



Resin soap is sometimes added to a solution of Paris green and water, 

 in order to make the material stick to smooth leaves. It may be 

 bought in stores, and should be used at the rate of 3 pounds to 50 

 gallons. 



Resin-lime mixture, especially adapted for the purpose of a ^' sticker," 

 is made by heating in an iron kettle 1 gallon of water, 1 pint of fish oil 

 or other animal oil, and 5 pounds of resin. Then add lye solution, 

 prepared by dissolving one can of lye according to the directions on 

 the can. After thorough stirring, add hot water to make 5 gallons, and 

 boil two hours, adding water to make up that lost by boiling. The re- 

 sulting liquid is light brown and clear and will unite smoothly with 

 cold water. For use take 3 gallons to 50 gallons of water, then add 3 

 gallons of thick whitewash, and finally add the Paris green. 



Advantages of Paris green are its cheapness, its quick action in kill- 

 ing insects, and the fact that it may readily be obtained in most stores. 

 Disadvantages are its Hability to adulteration, the fact that it settles 

 quickly in the spray barrel, that it sometimes burns the foliage, and 

 that it is rather easily washed off by rains. The last-named fact is an 

 advantage, rather than a disadvantage, if it is desired to spray plants 

 that will soon be ready for use, and will therefore need to be washed 

 clean. 



Arsenate of Lead 



Arsenate of lead (paste) 3 to 10 pounds 



Water 50 gallons 



or 

 Arsenate of lead (powder) . . . . 1 to 4 pounds 

 Water . .50 gallons 



For small quantities use: 



Arsenate of lead (paste) 1 tablespoonful 



Water 1 gallon 



Arsenate of lead is obtainable in two forms : a thick, light-colored 

 paste, or a white powder. The former is more commonly the manner 

 in which it is put up. The two do not differ chemically. Arsenate of 



