PRINCIPLES OF SPRAYING 



tures of chemical compounds made up for the 

 purpose of controlling plant diseases caused by 

 a class of plant weeds known as fungi. There 

 are three commonly well known and used fungi- 

 cides, Bordeaux mixture, commercial lime sul- 

 phur, and the self-boiled lime-sulphur. The 

 Bordeaux mixture is the best all-around fungi- 

 cide known. It is a mixture of three pounds of 

 copper sulphate (blue vitriol or bluestone) 

 with three or more pounds of fresh burned 

 stone lime In fifty gallons of water. The two 

 compounds should be put together as fruit 

 growers say " with water between," that is each 

 should be diluted with the water separately be- 

 fore the two are mixed. 



The best plan Is to have stock mixtures of 

 each In barrels, fifty gallon cider or vinegar 

 barrels making good receptacles for the pur- 

 pose. Place the bluestone In an old fertilizer 

 or meal sack and suspend It about midway 

 In the barrel of water. In a few hours It 

 will all be dissolved and will remain in sus- 

 pension for some length of time very well. 

 If say fifty pounds of the copper sulphate 

 are dissolved In fifty gallons of water, each 

 gallon of water will contain one pound of 

 the bluestone, which makes a very convenient 

 115 



