58 



VEGETABLE GARDENING. 



condition in the potatoes. (See Fig. 10.) The spread 

 of the disease and infection of soils is due mainly to 

 the distribution and planting of affected tubers, and 

 this must be carefully avoided. 



FIG. 9. Corky Scab. 



No effective method has been devised for dealing 

 with contaminated soil. Potatoes affected with 

 scab of any kind should preferably never be used 



FlG. 10. Severe form of Corky Scab. 

 Tuber badly cankered. 



for seed. Slightly infected seed, or seed which is 

 not above suspicion, may be disinfected by steeping 

 for three hours in a weak solution of commercial 



