PLATE 24 
Helminthosporium turcicum 
A.—Leaf of sweet com attacked by H. turcicum, showing extensive dry areas bear¬ 
ing fructifications near the center, and surrounded by slightly discolored margin. 
X^. Drawn from material collected near Valley Stream, N. Y., September 16, 
1920. 
Ba-p.—Conidia of H. turcicum produced on leaves of sweet com, showing varia¬ 
tion in size, shape, and septation. X500, 
Ca-g.—Conidiophores emerging in groups from stomata of sweet corn. X500. 
