12 HORTICULTURIST'S RULE-BOOK. 



applied, give the plant a good syringing with clean water. 

 For plant-lice. Practically out of use in the United States. 



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 gallons. The caustic soda is first dissolved in 

 about 16 gallons of water, after which 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.) 



Resin and petroleum soap. Water, 100 gallons; 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 added and the whole is 

 thoroughly stirred. While hot, place in a barrel and add 

 the remaining 80 gallons water, and emulsify by thoroughly 

 stirring. For scale on citrous trees. 



Resin soap. Ingredients for one barrel of 50 gallons : 10 

 pounds caustic soda, 98 per cent ; 10 pounds potash ; 40 

 pounds tallow; 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 tallow and resin together. When dissolved, 

 add the same to the potash and soda in the barrel, and stir 

 well for five minutes or so. Leave standing for about two 

 hours ; then fill up with water, stirring well as every 

 bucket of water goes in. Use the following day, 1 pound 

 to the gallon of water. Apply warm. For scale on de- 

 ciduous trees in summer. (Californian.) 



Resin, 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. 



