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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T041.pdf
Last checked: 11/14/2016
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| Publication Type:
| Report |
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| Author(s): | Settle, D.;
Rincker, K. |
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| Author Affiliation: | Settle: Chicago District Golf Association, Lemont; Rincker: University of Illinois, Urbana-Champaign, IL |
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| Title: | Fungicides and alternatives for curative control of fairy ring on a creeping bentgrass golf green in Chicago, 2009 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 5, No. 5, 2011, p. T041. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Control methods; Disease control; Fairy rings; Fungicide efficacy; Fungicide evaluation; Golf greens; Therapeutic control; Turfgrass quality
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| Cultivar Names: | Penn A-1 |
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| Abstract/Contents: | "Fungicides and alternative products were evaluated for the control of fairy ring on an established push-up green at Ruth Lake Country Club, in Hinsdale, IL; a west Chicago suburb. The green was renovated with methyl-bromide and seeded to 'Penn A-1' creeping bentgrass (Agrostis stolonifera) in 2004. The turf was mowed 6 days weekly to a height of 0.110-in. and fertilized with 3.0 lb N/1,000 ft2 during the season. Individual plots were 4 ft x 6 ft and arranged in a randomized complete block design with 4 replications. Treatments were delivered at labeled rates for fairy ring using a CO2-powered backpack sprayer with 8004 TeeJet flat fan nozzles at 40 psi in water equivalent to 2 gal/1,000 ft2. After application, the irrigation system was used to lightly water-in products. Disease outbreak occurred on 7 Aug and all treatments were applied curatively on 8 Aug. Type II fairy rings (lush, stimulated turf) were well-distributed across the study area and varied in size from 6-in. to several feet in diameter. Of eleven treatments, four were alternatives to fungicides and included; aerification (0.25-in. diameter solid-tine spikes on 2-in. centers), nitrogen (N) by urea, ConSan Triple Action 20 (disinfectant), and Revolution (wetting agent). Plots were rated on 8 Aug, 14 Aug, 24 Aug, 28 Aug, and 2 Sep. Percent fairy ring incidence and fairy ring number per plot were assessed visually. Turfgrass quality was also rated (1-9 scale, where 1 = entire plot area brown or dead; 6 = minimum acceptable color and quality for a putting green in summer; and 9 = optimum greenness, texture and density). The study objective was to find products or cultural practices that could provide curative control of fairy ring at midsummer without negative effects on plant health. Untreated plots saw peak type II symptom development of 30% on 24 Aug and by 2 Sep fairy ring no longer existed. Treatment differences were not detected by any fairy ring measurement on 14 Aug, a week after applications (data not shown). On 24 Aug, 16 days after treatments, Reserve and N by urea reduced fairy ring number compared to untreated. Nevertheless, all treatments were still of similar visual quality. Four days later on 28 Aug, fairy ring symptoms had subsided in a majority of treatment plots with differences across all parameters measured. Nevertheless, some treatments still exhibited type II symptoms of 10% or greater and they included, untreated, ProStar, Disarm, Insignia, and Revolution. In particular, a tendency of highest fairy ring levels occurred in ProStar plots, a fungicide commonly used for curative control of fairy ring in summer. Best curative control, reducing type II symptoms to less than 5%, was provided by DMI-containing fungicides of Triton and Tartan and the alternatives of N by urea and aerification. Visual quality was primarily influenced by fairy ring and not by phytotoxicity. ProStar and Revolution treatments provided no suppression of fairy ring and resulted in unacceptable turfgrass quality (< 6.0). Evaluating turfgrass quality throughout the entire study demonstrated that N fertility improved turfgrass health by improving its color and density and also by masking type II fairy ring symptoms. Only Reserve and Triton, both formulated with a green pigment called StressGard®, were similar to N in their visual quality by AUC analysis." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: Fairy Rings |
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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):
Settle, D., and K. Rincker. 2011. Fungicides and alternatives for curative control of fairy ring on a creeping bentgrass golf green in Chicago, 2009. PDMR: Plant Dis. Manage. Rep. 5(5):p. T041. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T041.pdf
Last checked: 11/14/2016
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Access conditions: Item is within a limited-access website |
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