DIRECTIONS FOE BORDEAUX MIXTURE, ETC. 



101 



lime water. When enough lime water has been used the test 

 will not change color. 



To prepare Ferrocyanide Test, dissolve one ounce of ferro- 

 cyanide of potassium (yellow prussiate of potash) in five ounces 

 of water. Bottle for use. 



Paris Green is an excellent insecticide for the destruction of 

 insects that eat foliage. Its use for the destruction of the po- 

 tato beetle is familiar. It should be used in the proportion of 

 one pound of the green to two hundred gallons of water, or 

 a teaspoonful of the green to a bucket of water. The green 

 should be first made into a thick paste with a little water before 



■■■\te.M: 



Fig. 6. The Knapsack Sprayer. A practical sprayer for small 

 fruits, shrubs, vegetables, etc., on a limited area. 



being added to the full amount of water. Lime water added to- 

 the solution will prevent damage to foliage and also make the 

 mixture adhere. 



Arsenate of Lead as an insecticide has been proven a great 

 success. 



Formula: Dissolve in one gallon of water eleven ounces ace- 

 tate of lead (sugar of lead); in another vessel dissolve four 

 ounces arsenate of soda in half a gallon of water; pour the arse- 

 nate solution into the lead solution, stir, and add to fifty gallons 

 of water. Hot water dissolves the chemicals more rapidly and 

 completely, and wooden pails should be used. The solutions- 



