The disease Rhizoctonia leaf and sheath spot (RLSS), caused by zeae Voorhees, is problematic in ultradwarf bermudagrass (UDBG) [Cynodon dactylon (L.) Pers. × C. transvaalensis (Burtt-Davy)] putting greens. Typically, RLSS symptoms are most severe late summer appear as frog-eye patches 10 to 40 cm diameter. In UDBG, often called “mini-ring” because of the small brown rings that produced when pro...