Necrotic ring spot (Ophiosphaerella korrae) is the most commonly diagnosed fungal turfgrass disease by the Utah State University Plant Pest Diagnostic Laboratory. The disease effects coolseason grasses in the state and region, particularly Kentucky bluegrass. The necrotic ring spot (NRS) disease pathogen infects and kills turfgrass roots and crowns, resulting in the blighted appearance of turf amidst an otherwise healthy area of turf

In the late summer/fall of 2015, Utah State University (USU) began a research study of the Ring to GREEN product by GreenMaster Distributing, LLC for the control of necrotic ring spot in turfgrass. Prior to USU’s involvement, product development had begun in 2010 and the product was patented in 2011. The patent included not only the Ring to Green product, but specific irrigation practices in conjunction with its use