Interaction of Management Factors on Dollar Spot Disease Severity in Tall Fescue Turf

in HortScience
Author: A.D. Brede 1
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  • 1 Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK 74078

A field study was conducted to evaluate the effect of tall fescue (Festuca arundinacea Schreb.) cultivar, seeding rate, N fertilization rate, and cutting height on the severity of dollar spot (Lanzia and Moellerodiscus spp.) disease incidence. All possible two-factor interactions among these four management factors were statistically significant when averaged over the 2 years of study. Disease severity tended to be lowest at low fescue seeding rate (2100 pure-live seeds/m*) at the lower (19 mm) height of cut. `Mustang', the turf-type cultivar with improved density, was more susceptible to dollar spot than `Kentucky-31', the common-type cultivar.

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