PLATE 4 
A. —Udo plant almost entirely dead, owing to the ravages of the Verticillium with 
which it was inoculated 4 months before the photograph was made. The base of the 
stem still shows some signs of life. 
B. —Same as A, except that the plant has been more resistant to the fungus. 
C. —Control plant, given in every way the same treatment as the plants shown 
in A and B, except that no inoculum was inserted in the wound. 
60377—23-4 
