Gray leaf spot primarily affects which type of grass?

Gray leaf spot is primarily associated with St. Augustinegrass, making it particularly important for those managing lawns or turf areas dominated by this type of grass. This fungal disease is caused by the pathogen Pyricularia grisea and is favored by warm temperatures and high humidity, conditions commonly found in the regions where St. Augustinegrass is grown.

St. Augustinegrass is widely utilized in southern climates, making it susceptible to gray leaf spot outbreaks, especially during periods of stress or when moisture is high. The symptoms of the disease, which include gray, irregular spots on the leaves, can significantly weaken the grass and result in unsightly patches, negatively affecting lawn aesthetics and health.

While Bermudagrass, fescue, and ryegrass can also experience other diseases and conditions, gray leaf spot is predominantly noted for its impact on St. Augustinegrass, distinguishing this disease's specific grass preference. Recognizing this association is crucial for effective management and control strategies in turf management practices.