14 The Horticulturisf s Rule- Book. 



Pyrethrum (Buhach), continued. 



Good insect-powder can be made from Pyrethrum roseum, 

 and probably also from P. cineraricefoUum, which is grown in 

 the home garden. 



Quassia.— Boil 4 ounces of quassia chips 10 minutes in a gallon 

 of water ; strain off the chips and add 4 ounces of soft water, 

 which should be stirred as it cools. Apply with syringe or 

 brush. Ten or fifteen minutes after it has been applied, 

 give the plant a good syringing with clean water. For plant- 

 lice. 



"Eesin soap.— Ingredients for one barrel of 50 gallons : 10 pounds 

 caustic soda, 98 per cent. ; 10 pounds potash ; 40 pounds tal- 

 low ; 40 pounds resin. First. — Dissolve the potash and soda 

 in 10 gallons of water. When dissolved, place the whole 

 amount in the barrel to be used. Second. — Dissolve the tal- 

 low and resin together. When dissolved, add the same to 

 the potash and soda in the barrel, and stir well for five min- 

 utes or so. Leave standing for about two hours ; then fill 

 up with water, stirring w^ell as every bucket of water goes 

 in. Use the following day, 1 pound to the gallon of water. 

 Apply warm. For scale on deciduous trees in summer 

 (Calif ornian.) 



Resin and fish-oil soap.— 20 pounds of resin, 1 gallon of fish-oil, 8 

 pounds of caustic soda, and enough water to make 100 gal- 

 lons. The caustic soda is first dissolved in about 16 gallons 

 of water, after which }4 of the solution is taken out and the 

 resin added to that remaining in the kettle. When all the 

 resin is dissolved, the fish-oil is added to it and the whole 

 thoroughly stirred, after which the balance of the caustic 

 soda solution is added very slowly and boiled for about an 

 hour, or until it will readily mix with water. Use an iron 

 kettle. For scale insects on orange and olive. (Calif ornian.) 



Kesin, soda and tallow soap.— Resin 2 pounds, caustic soda 1 

 pound, tallow 1 pound. Mix resin and soda, boil about 30 

 minutes and then add tallow. For use, add 2 gallons water 

 to a pint. Used in spray for scale. 



Resin and petroleum soap.— Water, 100 gals. ; resin, 17^ pounds ; 

 soda (60 per cent.), 7 pounds; fish-oil, 3 pounds; petroleum, 

 2 pounds. The resin, soda and fish-oil, with 20 gallons water, 

 are boiled together for four hours, when the kerosene is 



