PLATE 2 
A. —Conidial mats in almost continuous formation around the periphery of a root- 
rot circle. The mats were given a light coating of whitewash solution to accentuate 
the white color for photographing. September 6, 1922. 
B. —Weed growth and recovered alfalfa plants beginning to appear m the center 
of a rootrot circle. September 6, 1922. 
