212 AGRICULTURE 



And it also acts as a fungicide, especially when mixed with 

 lime-sulphur. 



Composition. Arsenate of lead is easily compounded, 

 the usual formula being : 



. 22 ounces acetate of lead dissolved in 2 gallons of warm 



water. 



8 ounces arsenate of soda dissolved in 1 gallon of water. 

 (Use wooden pail in each case.) 



The two solutions are now poured together and diluted 

 with water to make a mixture of fifty gallons, when it is 

 ready to spray. 



Arsenate of lead may also be procured in the form of 

 a paste ready to dilute for the spraying machine. Three 

 pounds of the commercial paste will make fifty gallons of 

 spray. It will hardly pay to go to the trouble of mixing the 

 compound at home, since the ready-made product usually 

 costs no more than the ingredients for making the mixture. 



Use. The arsenate of lead mixture may be used 

 either alone or with fungicides for destroying nearly the 

 whole range of biting insects attacking garden fruits. It 

 has proved of the greatest service, especially in the spraying 

 of apples. 



4. Paris Green 



Paris green is one of the oldest and best known of the 

 insect poisons. Several thousand tons are used each year 

 for this purpose. 



Composition. Paris green is often prepared for 

 spraying by simply dissolving from four to eight ounces in 

 fifty gallons of water. The standard formula, however, is : 



4 ounces of Paris green. 

 % pound of lime. 

 50 gallons of water. 



The lime is to be slaked and mixed with the water. The 



