amount* that may be used must depend upon the condition of the 

 atmosphere. During a bright, dry, windy day a much larger quan- 

 tity may be used than on a still day when the atmosphere is moist. 

 It should never he xised in cloudy or rainy weather, and this applies in 

 a greater or less degree to the kerosene emulsion. 



Pyrethrum Powder and Hellebore should be obtained in a perfectly 

 fresh condition and be kept in sealed tin cans or glass stoppered jars. 



FUNGICIDES. 



BORDEAUX MIXTURE. 



Formula. 4 lbs. Copper Sulfate, {Blue Vitriol). 

 4 lbs. Caustic Lime (Unslaked Lime.) 



Dissolve the copper in hot water. If suspended in a basket or 

 sack in a tub of cold water it will however dissolve in from two to 

 three hours. 



The lime is then slaked in another vessel adding water slowly that 

 it may be thoroughly slaked, then add enough water to make 5 to 10 

 gallons of the liquid. When both are cool, pour the lime into the cop- 

 per solution straining it through a fine meshed sieve or burlap strainer, 

 and thoroughly mix. Before using, add water enough to make 50 

 gallons of the mixture, and strain again when poured into the pump. 

 Many persons make the mistake when preparing the Bordeaux mixture 

 of straining the lime mixture while too thick, under which condition 

 much of its value is lost. Five to ten gallons of water should be 

 added to the lime wash before it is strained into the vessel contain- 

 ing the copper sulfate solution. The fine particles of lime hold the 

 copper and Paris green to the foliage and prevent injury, and if 

 properly strained nearly all of this fine material will go through the 

 nozzle without clogging. 



Stock solutions of both lime and copper i. e. 20, 36 or 48 lbs. of 

 * It is best to begin with 10 to ISj^laml increase unless some injury is noticed. 



