Fig. 30, Cabbage Diseases. 



a. Club root (after Cunningham), b. cell filled with spores of the club root or- 

 ganism, c. spores and swarm spores of Plasmodiophora brassica {b. and c. after 

 Chuff), d. black rot of cabbage (after F. C. Stewart), e. individual black rot germs of 

 Pseuaomonas campestris, f. black-leg on young cabbasre seedling, g. black-leg lesion 



on foot of older cabbage plant, A. black-leg lesior ■ - 



Phoma olerace<E,j. pycnospores of P. olexacecs {i. aiLc/;. riir.^r v.ivi=.v -..- 



