Influence of Management Practices on Rhizoctonia Large Patch Disease in Zoysiagrass

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  • 1 Department of Horticulture, Forestry, and Recreation Resources, Kansas State University, Manhattan, KS 66506
  • 2 Department of Plant Pathology, Kansas State University, Manhattan, KS 66506

Mowing heights from 1.2 to 5.1 cm, five N sources with two application rates (74 and 148 kg N/ha per year), and seven preemergence herbicides 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 was more severely blighted than turf mowed at 4.5 or 5.1 cm. At all mowing heights, turf recovered by August or September. Disease severity was not influenced by N source, N rate, or preemergence herbicides.

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