SECTION 5— IXSECTICIDMS. 



ARSEAITES. 



These poisons are of the greatest service against mandibulate insects, 

 and on account of their caustic properties arc of some use against soft- 

 bodied, haustellate insects. Unless used cautiously on most plants they 

 are liable to seriously burn the foliage. They may be used dry. either 

 pure or diluted with 100 to 200 parts of flour or other diluent, but are 

 best mixed in water, one pound to 200 to 250 gallons and applied by 

 spraying. To prevent injury to foliage add lime watery milky but not 

 thick enough to clog the nozzle, at the rate of 2 gallons to 100 gallons 

 of spray. White arsenic should never be used without this precaution. 

 Fruit trees should not be sprayed with arsenites until after the blossoms 

 have fallen, on account of the danger of poisoning bees. 



788. WHITE ARSENIC. 



Commercial white arsenic pounds . . 1 



Lime do 2 



Boil together in 2 to 5 gallons water for half hour. Dilute with loO 

 to 250 gallons of water. 



789. ARSENIC MASH. 



Arsenic parts . . 1 



Sugar do... 1 



Bran do... ti 



Thoroughly mix bran and arsenic. Dissolve sugar in water, add it 

 to the bran and arsenic, and mix thoroughly, adding water until the 

 whole mass is saturated. Placed about plants to protect from locusts. 



790. ARSENIATE OF SODA. 



Not commonly used. 



791. LONDON PURPLE. 

 Same as Paris green. 



792. PARIS GREEN. 



Used dry, dilated or undiluted. Ajs a spray, use 1 pound to 200 or 

 250 gallons of water, with addition o\' limewater as above. 



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