Brown ring patch caused by Waitea circinata

View Larger Torrey Pines Golf Course North green 7. Thematic map of relative volumetric soil moisture (VWC) and brown ring patch (BRP) symptoms. Light yellow dots represent locations where BRP was observed on 3/20/2008 and orange dots represent locations where BRP was observed on 3/13/2008. The volumetric water content for the red area ranges between 28 and 59%, the green area ranges between 59 and 64% and the blue area were above 64% (due to the high organic matter content of the soil, these values are not indicative of absolute moisture levels, but instead reflect relative levels). Disease was more prevalent in the areas with lower soil moisture.

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Turf Diseases