PLATE a 
Portions! of diseased (left) and healthy (right) Yellow Dent com plants in the same 
hill, grown at Bloomington, Ill., 1918. 
A. Basal portions showing excessive brace roots on diseased stalk (left) 
r —Oblique sections through the basal portions of same stalks. The vascular bundles 
cole* dlSeaSed plant ( left ) m black > while those of the healthy plant are normal in 
C^-The ear bearing portions of the same two stalks. Diseased stalk (left) with 
aborted ear; healthy stalk (right) with healthy ear. 
