Utah State University Extension
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. In Utah, the disease primarily affects Kentucky and annual bluegrass turf, although it can occur on tall fescue grass as well. O
Evans, Kent; Gunnell, Jaydee; and Frank, Erin, "Necrotic Ring Spot" (2008). All Current Publications. Paper 924.