REPORT OF THE SOCIETY 39 



INSECTICIDES 

 For Biting Insects 



Paris Green: 



Liquid application. — Use in the strength of 4 ounces to 40 gallons of 

 water, with about half a pound of fresh lime added. Where only a few plants 

 are being treated one teaspoonful, with the same quantity of lime, to a pail 

 of water is sufficient. 



Dry application. — 1 pound of Paris green mixed with 20 pounds of land 

 plaster, slaked lime or other perfectly dry powder. Should be used early 

 in the morning when the plants are wet with dew. 



Sticker. — When spraying cabbages, the leaves of which are co^'^red 

 with a waxy secretion, with a Paris green mixture the same will adhere 

 better if a "sticker" is added. Such can be made by boiling together for 

 about an hour, 2 pounds of resin and 1 pound of sal soda (crystals) in a 

 gallon of water. This is sufficient for 40 gallons. 



Arsenate of Lead: 



Preferred by many growers owing to the fact that it does not burn the 

 leaves and remains maich longer on the foliage than Paris green, not being 

 washed ofif to the same extent by rains. The powdered arsenate of lead is 

 used in the strength of 2 pounds to 40 gallons of water, the paste form in 

 the strength of 4 pounds to 40 gallons. For use in small quantities one 

 tablespoonful of the paste arsenate of lead is sufficient for one gallon of 

 water. 



Poisoned Bordeaux Mixture: 



Bordeaux mixture is made as follows: 



Copper sulphate (bluestone) ! 4 lbs. 



Unslaked lime 4 lbs. 



Water (1 barrel) 40 gallons. 



Dissolve the copper sulphate (by suspending it in a wooden or earthen 

 v^essel containing 4 or 5 or more gallons of water). It will dissolve more 

 quickly in warm water than in cold. Slake the lime in another vessel. If 

 the lime, when slaked, is lumpy or granular, it should be strained through 

 coarse sacking or a fine sieve. Pour the copper sulphate solution into a barrel, 

 or it may be dissolved in this in the first place; half fill the barrel with water; 



