CHAPTER XIV 



Poison Insecticides — For Biting Insects 



Paris Green 



Paris green 5 ounces 



Lump lime 1 pound 



Water 50 gallons 



For small quantities use : 



Paris green 1 heaping teaspoonful 



Lump lime 2 or 3 ounces 



Water 3 gallons 



Paris green is a bright green, heavy, finely divided powder, and is 

 one of the compounds of arsenic. It may be applied dry, but is much 

 better used in water or other liquid as a spray. It is a violent poison. 

 The present standard calls for at least 50 per cent arsenious oxid, and 

 not over 3^ per cent soluble arsenic. 



If applied dry, mix with three or four times the same weight of flour 

 or fine, air-slaked lime, preferably the latter. Dust lightly on the 

 plants. Be careful not to put on too much, or there will be danger of 

 burning the foliage because of the " free " or soluble arsenic apt to be 

 found in the material. A good way is to mix the poison and the lime 

 together, thoroughly, place in a muslin bag and shake gently over the 

 plants. If this is done when the dew is on, or just after a shower, the 

 material will stick better to the foliage. 



If to be used as a spray, Paris green may be mixed with water or with 

 Bordeaux mixture. In either case, the amount to use is from 4 to 5 

 ounces of the Paris green to 50 gallons of the liquid. If water 

 is used, add about 1 pound of fresh lump lime to each 50 gal- 

 lons of water. This is done to neutralize any soluble arsenic present 

 and thus avoid injuring the foliage. 

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