S. G. Paine and W. F. Bewley 



185 



The effect of different manurial treatments on the incidence of stripe. 



Total No. No. of diseased 



The effect of forced and slow growth on the incidence of the disease. 

 Forced growth Slow growth 



Besides showing the effect of manurial treatment and of forcing 

 conditions these tables bring out clearly marked differences in the 

 relative susceptibility of the varieties tested and point to the selection 

 or breeding of a resistant variety as one means of controlling the disease, 



THE MODE OF INFECTION. 



As stated above the most usual mode of infection would appear to 

 take place underground; young attacked plants show on examination a 

 Ann. Biol, vi 13 



