Which turfgrass is particularly affected by Red Thread?

Red Thread is a common disease of turfgrass, primarily caused by the fungus Laetisaria fuciformis. Fine fescue is particularly affected by this pathogen for several reasons. It thrives in cool, moist conditions, which are optimal for Red Thread development. Fine fescue, known for its fine leaf texture and shade tolerance, is sensitive to nutrient deficiencies, particularly nitrogen. Red Thread often appears when the grass is under stress or lacks proper nutrition, making fine fescue susceptible to the disease during periods of cool weather or when fertility management is inadequate.

In contrast, while Kentucky bluegrass can also be affected by Red Thread, it does not show the same level of vulnerability compared to fine fescue. Bermudagrass, a warm-season turf, is generally less impacted by this disease, as it does not grow during the cool, moist conditions that favor Red Thread. Tall fescue, while it may experience red thread issues, typically has a greater resilience and does not exhibit the same level of susceptibility as fine fescue. This context clarifies why fine fescue is highlighted as the turfgrass most significantly impacted by Red Thread.