Which of the following diseases is characterized by long, narrow stripes on the leaves of grain sorghum?

Bacterial streak is a disease that affects grain sorghum and is specifically characterized by long, narrow stripes or streaks on the leaves. These streaks typically start as small, water-soaked lesions that can elongate to form the characteristic stripes, often running parallel to the leaf veins. The presence of these stripes is a primary diagnostic feature that helps differentiate bacterial streak from other diseases.

In contrast, other diseases listed have different characteristics. For example, bacterial spot generally manifests as small, dark lesions rather than the elongated streaks associated with bacterial streak. Gray leaf spot is known for irregular lesions that can appear gray with dark borders, which is distinctively different from the stripe-like appearance. Anthracnose primarily causes dark lesions that can lead to browning and dieback, but it does not exhibit the narrow stripe pattern seen in bacterial streak. Understanding these specific symptoms allows for accurate diagnosis and appropriate management strategies for each disease.