DISEASES OF THE POTATO. 171 



to be the only way of stamping the disease out. Tubers 

 with the brown ring inside should be avoided as sets. 





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BACTERIAL DISEASE IN POTATOES. 



Sclerotium Disease (Sclerotinia Sclero- 

 tiorum). This is a fungoid disease which attacks the 

 stems of potatoes just above the ground. It is in the form 

 of a white mould, which gradually creeps up the stems and 

 develops into small black bodies called sclerotia. When 

 the latter stage is reached the stem becomes limp, withers 

 and dies, seriously checking the growth of the tubers. In 

 dry weather, the white mould is not apparent on the outer 

 surface, the disease being more active within. 



REMEDIES. All foliage showing any indication of the 

 disease should be burnt, otherwise the disease will attack 

 a future crop. It appears that beans, peas, marrows, 

 cucumbers and turnips are liable to be attacked also. 



Potato Rot (Phellomyces sclerotiophorus). 



According to Professor Johnson, D.Sc., F.L.S., of Dublin, 

 a new potato disease, caused by a fungus, has made its 

 appearance in Ireland. It is reputed to form a scab on, 

 and also dry rot in, the tubers. Professor Johnson first 

 observed the fungus in several potato varieties grown in 

 the west and other parts of Ireland in the autumn of 1901. 



