46 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



and 4 pounds of crystal salsoda (2 pounds only of anhydrous sal- 

 soda are necessary) , and boil together in 1 gallon of water for 

 twenty minutes. This forms a stock solution of arsenite of soda, 

 whichmaybe kept until needed. Put it in a jug and label " Poison." 

 When ready to spray add a quart of this solution and 3 or 4 pounds 

 of freshly slaked lime to each barrel of water (50 gallons) . When 

 used at this rate the arsenite of lime will cost about 7 cents for a 

 barrel, exclusive of labor in its preparation, as compared with 10 

 cents for an equal amount of Paris green ( lb.), or 20 cents for 

 arsenite of lead (2 Ibs.). Unless large quantities are to be used 

 for the purposes indicated, it will hardly pay the small user to 

 bother with its manufacture, and the danger of poisoning in the 

 mixing or in the careless disposal of waste or uncleaned utensils 

 must also be considered, though it may sometimes be useful in an 

 emergency when manufactured arsenicals are not available. 



6. Resin-soap Sticker. Upon the smooth foliage of such plants 

 as cabbage and asparagus it is exceedingly difficult to stick 

 Paris green or even arsenate of lead when used as a spray. To 

 obviate this the addition of resin-soap acts as a sticker. Place 

 5 pounds of pulverized resin and 1 pint of fish-oil or any cheap 

 animal oil, except tallow, in an iron kettle with 1 gallon of water, 

 and heat until the resin is softened; add the lye solution as made 

 for hard soap; stir thoroughly; add enough water to make 5 

 gallons and boil about two hours, or until the mixture will unite 

 with cold water, making a clear, amber-colored liquid. If the 

 mixture has boiled away too much, add sufficient water to make 

 5 gallons. This makes a stock solution of liquid resin soap. 

 For use add three gallons to 50 gallons of water, and add 3 gal- 

 lons of milk-of-lime or whitewash (3 Ibs. stone lime in 3 gallons), 

 and pound of Paris green. The addition of lime turns the 

 small soap particles into hard soap to which the Paris green 

 adheres and is thus distributed throughout the mixture in 

 uniform quantity and rendered exceedingly adhesive. The 

 stock solution may be added directly to Bordeaux mixture with- 

 out the addition of extra lime, to which Paris green or arsenate 

 of lead may be added in the usual quantity. Similar resin soap, 



