8 



11. Hellebore. 



Hellebore, 1 ounce. 

 Water, 1 to 2 gallons. 



Steep the hellebore in a pint of water and gradually add the 

 rest of the water. It may also be used dry, dusted on the 

 plants, either pure or mixed with about half its bulk of flour 

 or plaster. 



12. Insect Powder (Pyrethrum. Buhach). 



Mix with half its bulk of flour or plaster, and keep in a 

 tight can twenty-four hours; then dust on the plants. 



FUNGICIDES. 



13. Bordeaux Mixture. 



Copper sulfate (blue vitriol), 4 pounds. 

 Lime (unslaked), 4 pounds. 

 Water, 25 to 50 gallons. 



Dissolve the copper sulfate in some of the water in a wooden 

 or earthen dish. Slake the lime in a wooden pail, using only 

 enough water, added carefully, to slake thoroughly. Now add 

 water and stir, till the lime is about like thick cream. Place 

 the rest of the water not already used in a barrel, and pour 

 these into the water together and stir. Strain through a fine 

 wire mesh before using. 



Trouble in obtaining good Bordeaux mixture may be due to 

 poor lime. Select lumps for slaking, and with small amounts 

 use hot water. In slaking, neither allow the lime to dry nor be 

 entirely covered by water. After the final mixing, put a knife 

 blade into the mixture, and if copper is deposited on the blade 

 add a little more lime. 



There are five different strengths of Bordeaux mixture, for 

 use under different conditions. 



(a) Copper sulfate and lime, 4 pounds each; water, 25 

 gallons. 



(6) Copper sulfate and lime, 4 pounds each; water, 50 

 gallons. 



