Department of Plant Pathology
North Carolina State University
Adequate rainfall coupled with warm days and cooler nights this spring has lead to increased dollar spot activity on both cool and warm-season turfgrasses. Dollar spot activity will continue until daytime highs consistently exceed 90°F. Turfgrasses that are deficient in nutrients, especially nitrogen, are more susceptible to dollar spot and will take longer to recover than well-fertilized turf.
For more information about fertility rates and application dates, please refer to the following site: http://www.turffiles.ncsu.edu/Maintenance_Calendars.aspx#000024
For more information about dollar spot and preventative fungicide programs, please visit the following link: http://www.turffiles.ncsu.edu/diseases/dollar-spot