Figure 1.

Typical symptoms of Bipolaris leaf spot of maize in the field. (a,b): Type I symptoms included fusiform or elliptical lesions; (c,d): Type II symptoms were characterized by elongated, nearly long strip lesions restricted by veins; (e): Type III symptoms were long, narrow linear lesions; (f): Type IV symptoms were nearly circular lesions that were smaller than the Type I lesions; (g): Type V symptoms were punctiform or minute necrotic lesions.