Fact Sheets - Turfgrass Diseases

Necrotic Ring Spot (NRS) is a fungal disease that primarily affects the roots of turfgrasses. The disease occurs on turfgrasses worldwide. Many turf species can serve as host to the disease.

Necrotic ring spot and summer patch are two fungal diseases with similar above ground symptoms. Both pathogens mainly affect the root system and stolons of Kentucky bluegrass, annual bluegrass and tall fescue.

Snow molds are fungi that attack turfgrass under snow cover or in cool, wet weather. There are two different types of snow mold fungi that can infect grass and they can occur together on a plant.

Take-all patch is a fungal disease of turfgrasses that primarily affects the roots of certain grass species. It has become a major disease of cool-season turfgrasses and can be found in many parts of the United States.