What are the visible signs of Pythium blight in turf?

Pythium blight is characterized by distinctive visible signs that help in identifying this turf disease. The presence of round to irregular spots that appear suddenly on the turf is a classic symptom of Pythium blight. These spots typically have a water-soaked appearance, and as the disease progresses, they can grow larger and lead to areas of turf that look wilted or collapsed. This rapid onset and visible change in the turf's condition are key identifiers of Pythium blight.

In contrast, other symptoms listed, such as yellowing of leaf tips and thickening of leaf blades, do not accurately reflect the specific characteristics of Pythium blight. Healthy green patches are also not associated with this disease, as affected areas typically do not maintain a healthy appearance. Understanding these typical signs helps in recognizing and managing Pythium blight effectively.