130 The Fruit-Growers Guide-Book 



cased leaves and fruit disposed of either by gathering and 

 burning or turning them under by plowing and cultivating. 



Bordeaux Mixture 



Copper sulphate (blue-stone or blue vitriol), 4 pounds. 

 Fresh lump lime, 4 pounds. 

 Water, 50 gallons. 



Dissolve the copper sulphate and slake the lime in a 

 part of the water. When the lime has all slaked to a fine 

 powder and the copper sulphate thoroughly dissolved, 

 dilute each of them with half of the remaining volume of 

 water, then pour them together, stirring constantly. A 

 more convenient method is to dilute the materials in suit- 

 able tanks and run them together and at the same time 

 into the spray tank. 



Stock solutions of either copper sulphate or lime may 

 be made up in the proportions of one pound of each to a 

 gallon of water. To make up the spraying mixtures, four 

 gallons of each can be measured out, diluted and mixed as 

 before. The solutions of copper sulphate and lime should 

 never be brought together in strong solutions as they do 

 not make a satisfactory spraying material when thus 

 treated. 



Soda Bordeaux Mixture 



Copper sulphate, 4 pounds. 



Caustic soda (soda lye), 1 to V/ 2 pounds. 



Water, 50 gallons. 



Dissolve the copper sulphate in water as for the regular 

 bordeaux mixture, and then add just 'enough of the soda 

 lye dissolved in water to neutralize the mixture. There 

 should be no more nor less of the soda lye used than is 

 necessao' to neutralize the mixture, and one will need a 

 strip of blue and red litmus paper to do the testing. When 

 neutral neither of the papers will change color, while if 

 the mixture is acid the blue paper will turn red, and if too 

 much of the soda has been used, the red paper will turn 



