AbstractDollar spot, caused by Clarireedia spp., is one of the major challenges in golf course management. While individual cultural practices such as adequate nitrogen fertilization, thatch removal, aeration, and dew removal (DR) can reduce dollar spot severity, there are limited reports across multiple locations on the effectiveness of integrating multiple cultural practices for improved dollar spot suppression. Field studies were conducted in Wisconsin, Ohio, Pennsylvania, and Virginia to evaluate the efficacy of urea fertilizer, DR, and a plant growth regulator (PGR) in dollar spot management on golf course greens and fairways. Each of the three treatments had two levels including applied or not applied. Urea and early DR reduced dollar spot severity across several locations, while PGR did not affect disease suppression. In some locations, the two‐way and three‐way interaction effects were significant, where combining the treatments reduced disease severity compared to non‐treated plots or when only one treatment was applied. Overall, the urea application had the most notable and consistent impact on reducing disease severity, while the effectiveness of DR and PGR varied depending on the location and year. Results from this study provide insights into the development of an effective integrated management program for dollar spot.
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