What are the symptoms of Melting-Out and Helminthosporium Leaf Spot?

Melting-Out and Helminthosporium Leaf Spot are both associated with specific symptoms on affected plants, particularly grasses. The correct answer highlights that these diseases produce circular and elongated spots that can have brown or straw-colored centers.

Understanding these symptoms is crucial for effective diagnosis and management. The appearance of these spots is a direct result of the fungal pathogens attacking the leaf tissues. The brown or straw-colored centers indicate tissue death, which is characteristic of fungal infections where the damage progresses, leading to necrosis of the leaf area.

The other options describe symptoms that do not accurately align with the known characteristics of Melting-Out and Helminthosporium Leaf Spot. For instance, circular spots with a green center or small reddish-brown spots might relate to different disease syndromes or issues, but they do not uniquely identify the symptoms of these specific fungal diseases. Wilting and yellowing of grass blades could be indicative of broader stress conditions, such as drought or nutrient deficiencies, rather than specifically pointing to the symptoms caused by the pathogens related to these diseases.