



EXPERIMENTS WITH INSECTICIDES AXD FUNGICIDES. I99 



OTHER ARSENICAL COMPOUNDS. 



The arsenoids, London purple, Paragrene, etc., have been used 

 in the State only to a very limited extent. Any one interested 

 will find these discussed in Bulletin 68 of this Station. 



Insecticides Carrying a Small Percentage of Arsenic. 

 There are a number of insecticides in the market, some of 

 which purport to be better than Paris green, all of which are 

 dependent upon arsenic in some form for whatever value they 

 possess as insecticide. These materials practically consist of 

 Paris green mixed with gypsum, coal dust, or something of that 

 kind, and are for all practical purposes simply badly adulterated 

 Paris green. Their cost is considerably less than that of a pure 

 green, but the poison they contain costs the consumer from five 

 to ten times as much as it would if he were to buy a good green 

 and mix it with the diluents. 



BLACK DEATH, QUICK DEATH, ENGLISH BUG COMPOUND. 



Black Death has been quite extensively advertised in this State 

 and probably has been more or less used. Its analysis shows it 

 to be Paris green diluted with gypsum to make weight, and 

 colored with charcoal or coal dust. According to the analysis of 

 the U. S. Department of Agriculture it carries about 1.75 per 

 cent of Paris green ; the other constituents being chiefly gypsum 

 and carbon. It follows, therefore, that it would take more than 

 fifty pounds of Black Death to equal one pound of Paris green 

 as an insecticide. 



Quick Death, made by the American Insecticide Company, 

 Binghamton, N. Y., in appearance and composition resembles 

 Black Death and is stated by those who should know to be 

 Black Death under another name. 



English Bug Compound has not been heard of very much 

 lately. A sample examined a few years ago consisted of white 

 arsenic diluted with gypsum. 



kxo-buc. 



Kno-bug is a reddish brown powder made by the Carpenter- 

 Alorton Company of Boston, which, according to the claim of 

 the makers in 1902, destroys potato bugs, acts as a vegetable 

 tonic, stimulates the growth of the plant, and prevents blight, 

 scab and rust. 



