THE POTATO 171 



portions burned, and the tubers boiled without 

 delay. If possible the surrounding soil should also 

 be removed and burned, or at least heavily dressed 

 with gas-lime. Further, when the field is next 

 planted with potatoes the piece of ground where 

 the disease appeared should be fallowed and 

 dressed with gas-lime at the rate of four to five tons 

 per acre. 



"If the attack has occurred in a garden required 

 for frequent potato growing, the occupier should 

 dig out and burn, not only the affected plant, but 

 a considerable quantity of the surrounding soil so 

 as to ensure that every fragment of the diseased 

 plant is destroyed. Gas-lime should then be ap- 

 plied to the soil. 



"If fields worked on the four-course rotation 

 have become generally infected, farmers should 

 replace the potato by some other crop, so as 

 to let eight years intervene before the next 

 potato crop is planted. The sets should be dusted 

 with sulphur before planting, as recommended 

 above. 



"In gardens and allotments in which the disease 

 has appeared, potatoes should on no account be 

 planted on the same piece of land next season, and 

 one of the following methods of treatment may be 

 adopted : 



"(a) The ground toward the end of April, 

 should be covered with gas-lime (two pounds to the 

 square yard), which may be forked into the surface 

 soil to a depth of three inches. After lying fallow 

 until the end of June it should be dug and prepared 

 for cabbages. 



"(b) If the soil be deep, two pounds of gas- 

 lime per square yard may be applied at the end of 

 March, and a month later the soil should be in- 



