TechNotes Tips - Bermudagrass Archive

Bermudagrass decline (pathogen: Gaeumannomyces graminis var. graminis) causes damage to bermudagrass in the southeastern United States. Symptoms usually appear during the summer as irregular shaped patches. The patches can range up to several feet in diameter. Extensive stand thinning can also occur. Roots on stolons are dark in color and restricted. Acidifying nitrogen sources are preferred in situations where bermudagrass decline is likely to occur. Potassium fertilization in the fall should be promoted. Some turfgrass pathologists recommend the use of chloride (murate of potash) form of potassium over the sulfate. The organism Gaeumannomyces graminis var. graminis, is also associated with causing spring dead spot on bermudagrass The infection in this case occurs in the fall with symptoms expressing themselves in the spring. Potassium fertilization enhances the winter survival of bermudagrass.

Late season fertilization with nitrogen on bermudagrass is a desirable practice in the southern U.S. As you move north and closer to the transition zone, nitrogen fertilization of bermudagrass may enhance winter injury. Potassium fertilization in the autumn is a recommended practice to enhance the winter tolerance of bermudagrass.