THE POTATO, 



fore putting it in the sprayer. See that the solution is 

 kept well stirred, and bear in mind that sulphate of copper 

 is a poison, and therefore the solution should not be put 

 in pails or other receptacles that are to contain water for 

 drinking purposes. On no account pour the sulphate of 

 copper into the soda solution, but add the latter to the 



POTATO; ROOT INFECTED WITH BLACK SCAB OB WAKT DISEASE. 

 (Seep. 170.) 



former, and that slowly. Spray for the first time at the 

 end of June, again early in July, and lastly at the end of 

 that month- Spray when the foliage is dry only. See that 

 the undersides of the leaves are thoroughly moistened with 

 the golutjon. Use 120 gallons per statute acre, or 194 



