172 The Spraying of Plants. 



SODA AND ALOES. 



Washing soda 2 pounds. 



Bitter Barbadoes aloes 1 ounce. 



Dissolve the above in hot water, and when cool add 

 Water 1 gallon. 



The preparation has been recommended for destroying plant 

 lice, but in order to be effective the plants must be dipped in 

 the mixture, and in half an hour syringed off with clear water. 



SODA AND RESIN WASH. 



Sal-soda 3 pounds. 



Hot water 1 pint. 



Then slowly add 



Resin 4 pounds. 



Hot water 2 pints. 



These should be thoroughly mixed, and before using should 

 be diluted with 5 gallons of water. 

 SODA AND WHALE-OIL SOAP WASH. 



Sal-soda 25 pounds. 



Water 25 gallons. 



Boil until dissolved, when 1*- gallons of whale oil should be 

 added. It is applied only to dormant wood, and is particularly 

 useful in destroying scale insects. Apply at a temperature of 

 130 F. 



SODIUM ARSENATE. See ARSENATE OF SODA. 



SODA WASH. 



Washing soda I pound. 



Water 2 gallons. 



The liquid is ready for use as soon as the soda is dissolved. 

 It has a caustic action upon foliage, so should be used only upon 

 dormant wood. It is said to be of value against borers and 

 scale insects. 



SODIUM HYPOSULPHITE ; NA 2 S 2 O 3 . Solutions of the hypo- 

 sulphite of soda have been very thoroughly tested in respect to 



