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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T027.pdf
Last checked: 11/14/2016
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| Publication Type:
| Report |
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| Author(s): | Smith, D. L.;
Walker, N. R. |
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| Author Affiliation: | Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, OK |
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| Title: | Evaluation of consumer and commercial fungicides for control of brown patch of tall fescue in Oklahoma, 2010 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 5, 2011, p. T027. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Festuca arundinacea; Fungicide efficacy; Fungicide evaluation; Fungicide industry trends; Rhizoctonia blight; Rhizoctonia solani
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| Cultivar Names: | Rebel IV |
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| Geographic Terms: | Oklahoma |
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| Abstract/Contents: | "This trial was conducted to evaluate the efficacy of consumer and commercial fungicides for the control of brown patch of tall fescue in Oklahoma. Plots were established at the Turfgrass Research Center in Stillwater, OK. Plots were 3 ft wide and 8 ft long with 2-ft alleys between plots. The experimental design was a randomized complete block with four replicates. The turfgrass sward was a mature stand of tall fescue on an Easpur loam soil, which had a history of severe brown patch. Mowing height was 3-in. and irrigation was applied to maintain an environment favorable for the disease. Recommended turfgrass management practices were followed throughout the growing season. Fungicides were applied preventatively or curatively. Spray intervals varied by product with a total of four 14-day preventative applications, two 28-day preventative applications, three 14-day curative applications, and two 21-day curative applications. Fungicides readily available to consumers were compared to the commercial fungicides, Heritage, Heritage G, Tartan, Trinity, and a non-treated control. Liquid fungicides were applied with a CO2-pressurized wheelbarrow sprayer equipped with TX8008 flat fan nozzles and calibrated to deliver 87 gal/A or 2 gal/1,000 ft2. Granular fungicides were pre-weighed and broadcast by hand. Preventative treatments were initiated on 11 Jun prior to symptom development. Curative treatments of fungicide were initiated on 25 Jun after symptoms of brown patch developed. Ratings of disease severity (percent of plot area with symptoms of brown patch) and turfgrass quality (scale of 1 9 where 1 = no turf present, 5 = unacceptable turfgrass, 6 = acceptable turf, 9 = dense, dark color, thick stand of turfgrass) were taken at weekly intervals from 11 Jun to 6 Aug. Disease severity data were subjected to the area under the disease progress curve (AUDPC) transformation to account for season-long ratings. AUDPC and average turf quality data were analyzed using ANOVA (α = 0.05). Multiple comparisons of means were performed using Fisher's test of protected least significant difference (α = 0.05). Weather conditions early in the study were wet and cool. Weather patterns then transitioned to unseasonably hot and dry with high humidity in mid-June and persisted for the remainder of the trial. Highest seasonal levels of disease were observed in plots treated with curative applications of Fertilome Liquid Systemic Fungicide and Spectracide Immunox Lawn Disease Control, or preventative applications of Tartan 2.4SC. These treatments were not significantly different from the non-treated control. Only preventative applications of Heritage G at 2.0lb/1,000 ft2 and Heritage at 0.2 oz/1,000 ft2 provided significantly better control of brown patch than the non-treated control. However, plots treated with the preventative applications of Heritage G at 2.0lb/1,000 ft2 were not different from all other fungicide treatments except curative applications of Fertilome Liquid Systemic Fungicide, Spectracide Immunox Lawn Disease Control, Ortho Garden Disease Control and preventative applications of Tartan 2.4SC and Fertilome Liquid Systemic Fungicide. Average turf quality was lowest (considered marginally acceptable) in plots treated with Fertilome Liquid Systemic Fungicide (curative). Plots treated with this fungicide were not significantly different from the non-treated control. All other fungicide treatments had turf quality similar to the non-treated control except Heritage (preventative). Symptoms of phytotoxicity were not observed for any of the treatments." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only!
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Smith, D. L., and N. R. Walker. 2011. Evaluation of consumer and commercial fungicides for control of brown patch of tall fescue in Oklahoma, 2010. PDMR: Plant Dis. Manage. Rep. 5:p. T027. |
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| Web URL(s):
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Last checked: 11/14/2016
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Access conditions: Item is within a limited-access website |
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