Il6 MAINE AGRICULTURAL EXPERIMENT STATION. I908. 



There is no law in this State regulating the sale of Paris green 

 but where a state inspection is in effect the requirements are 

 generally, very similar to those in the New Jersey law,* section 

 3 of which reads : 



"Paris green, or any product analogous to it, when sold, 

 offered or exposed for sale as such, in this State shall comply 

 with the following requirements : 



First. It shall contain arsenic, in combination with copper, 

 equivalent to not less than fifty per centum arsenious oxide. 



Second. It shall not contain arsenic in water-soluble forms 

 equivalent to more than three and one-half per centum of arsen- 

 ious oxide." 



In the case of the Ansbacher and Raynolds greens, the samples 

 obtained in 1907 were not as finely powdered as those of 1906. 

 The large amount of water soluble arsenic as shown by both the 

 microscope and by chemical analysis, as well as the relative 

 coarseness of the particles make Raynold's greens the least desir- 

 able of the 4 brands found on sale in Maine. The reported cases 

 of burning of foliage and failure to kill the potato bugs reported 

 from some users of Raynolds green may perhaps be explained 

 by these analyses. As noted above it is unlawful in the state 

 of New Jersey to sell a Paris green carrying more than 3^ per 

 cent water soluble arsenious oxide. Raynolds greens were 

 found to carry more than double that amount. 



HOW TO USE PARIS GREEN. 



Paris green is more economically applied with water than any 

 other way. It should always be applied with lime to diminish 

 danger of injury to foliage. If green of good quality is used, 

 one-half pound to 50 gallons of water is sufficiently strong if 

 used just before slugs or caterpillars appear. 



The following formulas for fungous enemies and insects 

 which chew, are those that have been recommended by this 

 Station for many years. 



Formula 3. paris green. 

 For insects that chew. 



Paris Green Vz pound 



Lime (unslaked) 3 pounds 



Water 50 gallons 



*Bul. 205, N. J. Station. 



