PLATE 3 
Basal portions of Early May wheat plants infected with Helminthosporium sativum. 
A. —Discoloration of bases of nearly mature plants grown in Helminthosporium- 
infested soil in the field, characteristic of attacks of H. sativum . 
B. —Discolored lesions on the bases of culms shown in A, the leaf sheaths having 
been removed. These are typical of basal discolorations caused by H. sativum. 
