An unknown disease of creeping bentgrass has been observed in the Southeastern United States since 2002. Irregular patches ranging from 10 to 60 cm in diameter develop during periods of stress. Roots of affected plants are tan, lack cortical organization, have devitalized root tips, and have little to no root hairs. This disease is suspected to be Pythium root dysfunction, and Pythium volutum has been consistently isolated from affected roots. In order to develop effective control recommendations, preventative and curative fungicide trials were conducted in several locations from 2003 to 2005. Treatments in curative and preventative trials included fosetyl-Al, mefanoxam, ethazole, propamocarb, azoxystrobin, trifloxystrobin, pyraclostrobin, cyazofamid, and combinations of these chemicals. When applied on a curative basis, mefanoxam, ethazole, propamocarb and fosetyl-Al provided moderate to poor disease suppression. A tank mixture of azoxystrobin and thiophanate-methyl provided good curative control, but azoxystrobin applied alone provided no curative suppression. Pyraclostrobin provided excellent disease suppression when applied curatively. In general, better disease suppression was observed when these products were watered-in with 0.32 cm of irrigation immediately after application. A preventative trial was initiated in the fall of 2004. Treatments were applied on 29 Sep 04, 27 Oct 04, 29 Mar 05, 19 Apr 05, and 26 May 05 and disease severity ratings were taken when disease symptoms appeared on 13 Jul 05. Azoxystrobin, pyraclostrobin, and cyazofamid treatments significantly reduced disease severity compared to the untreated plots, with pyraclostrobin and cyazofamid providing superior disease control compared to azoxystrobin.