INFLUENCE OF MANAGEMENT-PRACTICES ON RHIZOCTONIA LARGE PATCH DISEASE IN ZOYSIAGRASS

Mowing heights from 1.2 to 5.1 cm, rive N sources with two application rates (74 and 148 kg N/ha per year), and seven preemergence herbicide s were evaluated in field studies in Manhattan and Wichita, Kan., for their effect on large patch disease, caused by Rhizoctonia solani Kuhn AG 2-2, in zoysiagrass (Zoysia spp.). Turf mowed at 1.2 and 2.5 cm wa s more severely blighted than turf mowed at 4.5 or 5.1 cm. At all mowi ng heights, turf recovered by August or September. Disease severity wa s not influenced by N source, N rate, or preemergence herbicides.