58 Report of State Board of Horticulture. 



paris green spray — arsenite of lime spray. 



These sprays are used for codlin moth, larvce, tinges, caterpillars, 

 slugs, and all eating or biting insects. 



PARIS GREEN SPRAY. 



Proportions for first application — 



Paris green, four ounces. 

 Lime, two pounds. 

 Water, 40 gallons. 



Proportions for later applications — 



Paris green, four ounces. 

 Lime, one pound. 

 Water, 50 gallons. 



te^ 



DirectiansSlack the lime; make a paste of the paris green, 

 mix thoroughly, and then add water to make the required amount : 

 stir thoroughly while using, and should be thrown on the leaves and 

 fruit in a fine spray. 



Paris green is one of our commercial articles which is shamefully 

 adulterated. The foregoing formula is based upon pure paris 

 green; it is, therefore, of much importance that one be able to de- 

 tect impui'ities. So far as we know but two adulterants are used- 

 gypsum and Glauber 's salts. The method generally given for the de- 

 tection of adulteration is to dissolve a small sample of the paris green 

 in ammonia. If there is any gypsum it will not dissolve, but form 

 a sediment. Glauber's salts cannot be detected by this method, it 

 being equally as soluble as pure paris green ; but if one has a strong 

 microscope at hand the adulterant granules can be easily detected, 

 they being white, while the pure article is green. Ammonia, how- 

 ever, is generally a good test, gypsum being most commonly used 

 as an adulterant. ' 



the ARSENITE OF LIME SPRAY. 



Professor Kedzie's formula: 



Ingredients— CommerGial white arsenic, one pound. 



Carbonate of soda, four pounds. . 

 Water, two gallons. 



Use one and one-half pints to 50 gallons of bordeaux mixture. 



