Figure 1. Dark zone lines in the longitudinal section of the lower stem are an indicator of Diaporthe fungal infection.
Figure 2. Soybean infected with pod and stem blight disease have black specks that are in linear rows.
Figure 3. Anthracnose infected soybean stem with black lesions in an unorganized pattern.
Figure 4. Black, dusty microsclerotia in an unorganized pattern on the outer stem are a characteristic symptom of charcoal rot
Figure 5. Dark zone lines on the lower stem are an indicator of Diaporthe fungal infection.
Figure 6. Stem canker in soybeans caused by the fungus Diaporthe.
Author: Samantha Reicks