Full TGIF Record # 225889
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Author(s):Hoyland, B. F.; Landschoot, P. J.; Soika, M. D.; Sanders, P. L.
Author Affiliation:Hoyland: Research Technologist, Agronomy; Landschoot: Assistant Professor, Turfgrass Science; Soika: Sr. Research Aide; Sanders: Assistant Professor, Agronomy
Title:Effect of various nitrogen sources on suppression of brown patch and dollar spot diseases
Section:1991 results: Disease control in turfgrass
Other records with the "1991 results: Disease control in turfgrass" Section
Source:Turfgrass Research Results 1990/1991 [Penn State]. 1991, p. 103-104.
# of Pages:2
Publishing Information:[University Park, Pennsylvania]: [Pennsylvania State University, College of Agriculture, Agronomy Dept., Entomology Dept., Horticulture Dept., Plant Pathology Dept.]
Keywords:TIC Keywords: Agrostis stolonifera; Dollar spot; Sclerotinia homoeocarpa; Rhizoctonia blight; Rhizoctonia solani; Suppression; Nitrogen fertilizers
Abstract/Contents:"This study was conducted in 1991 at the Joseph Valentine Turfgrass Research Center, University Park, PA. The test was performed on 'Penncross' creeping bentgrass maintained under golf course putting green management conditions. The turf was mowed daily at 0.16 in. The experimental area was fertilized in October 1990 with 1.0 lb N/1000 sq ft as sulfur-coated urea and no fertilizers were applied thereafter with the exception of the fertilizer treatments. Individual plots, 3 ft by 15 ft, were arranged in a randomized complete block design with three replications. The entire plot area was inoculated on 10 June, 1991 by hand scattering Sclerotinia homoeocarpa rye grain. All granular fertilizers, with the exception of Nitroform, were applied by hand using jars with perforated lids on 12 June and 10 July. Nitroform was applied once on 12 June. Fungicide treatments were applied with a CO2-powered backpack sprayer, using T-jet ss8004 flat fan nozzles, at 30 psi, in 340 ml of water per 45 sq ft plot. Fungicide applications were made on 12 June, 26 June, 10 July, and 24 July. Brown patch severity was visually rated on 5 July and 10 July, and dollar spot severity was visually rated on 19 July and 7 August. No statistically significant reduction in brown patch severity relative to the untreated control and the fungicide treatment was obtained with any of the fertilizer treatments. On 5 July, only Sustane at 1.0 lb N/1000 sq ft showed a significantly greater degree of brown patch than the untreated control and fungicide treatment. On 10 July, brown patch was not significantly greater on the Sustane (1.0 lb N/1000 sq ft) plots than the control plots, however, this was the only fertilizer treatment that showed a significantly greater amount of brown patch than the fungicide treatment. All fertilizer treatments showed a significantly greater degree of dollar spot disease than the fungicide treatment. On 19 July, Ringer Commercial Greens Super (1.0 N/1000 sq ft) was the only treatment that showed significantly less disease than the untreated control. No treatment showed significantly greater amounts of dollar spot disease than the untreated control on either date."
Note:Reprint appears in Biological and Cultural Tests for Control of Plant Diseases, Vol. 7 1992, p. 105
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hoyland, B. F., P. J. Landschoot, M. D. Soika, and P. L. Sanders. 1991. Effect of various nitrogen sources on suppression of brown patch and dollar spot diseases. Turfgrass Research Results 1990/1991 [Penn State]. p. 103-104.
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