POTATOES 129 



Treat seed with a solution of bichloride ofc" mercury (1 oz. in 

 8 gal. of HoO) for ten minutes. 



Keplace old soil in seed bed with new soil, or preferably sand, 

 from a high place in the woods or from where sweet potatoes 

 have not been grow^i. 



After removing old soil it is a good plan to disinfect this bed 

 with a formalin solution (1 pint Formalin to 25 gal. HoO). 



Move the bed every year if possible. 



Do not use manure in beds or fields from stock to which sweet 

 potatoes have been fed unless the potatoes were previously 

 cooked. 



Burn diseased plants. 



Eotate crops. 



