Evaluation of New Fungicides and Surfactants for the Management of Fairy Ring Associated with <i>Lycoperdon</i> sp. in Bermudagrass

Fungicides were evaluated for control of fairy ring symptoms in bermudagrass maintained at golf course putting green height. In 2004, Heritage and ProStar fungicides tank‐mixed with the nonionic soil wetting agent AquaGro had significantly higher quality ratings and lower percent necrotic ring symptoms compared to the untreated check. Insignia significantly reduced the percent necrotic ring when compared to the untreated check although the mean quality ratings were significantly lower than those for Heritage or ProStar treatments. In 2005, when fungicides were applied closer to the onset of symptom development, with the soil surfactant Magnus, Insignia reduced percent necrotic ring symptoms and increased turf quality to levels at or above those of Heritage or ProStar‐treated plots. In 2005, Insignia + Magnus resulted in higher quality than Insignia alone. In both 2004 and 2005, neither of the soil surfactants alone was effective at reducing fairy ring development. Treatments containing Insignia (two trials in 2005) and Heritage (one trial in 2005) continued to have significantly higher turf quality, even 6 or 7 weeks after the last fungicide application.