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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T036.pdf
Last checked: 11/14/2016
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| Publication Type:
| Report |
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| Author(s): | Settle, D.;
Sibicky, T.;
Rincker, K. |
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| Author Affiliation: | Settle and Sibicky: Chicago District Golf Association, Lemont; Rincker: University of Illinois, Urbana-Champaign, IL |
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| Title: | Preventatvie control of brown ring patch and Microdochium patch on a Chicago Poa annua golf green, 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. T036. |
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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: Brown ring patch; Disease control; Fungicide evaluation; Golf greens; Microdochium nivale; Microdochium patch; Poa annua; Preventive control; Waitea circinata var. circinata
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| Geographic Terms: | Chicago, Illinois |
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| Abstract/Contents: | "Fungicides and urea nitrogen were evaluated to suppress brown ring patch (hereafter 'Waitea') on an established push-up green, at Biltmore Country Club, in N. Barrington, IL; a northwest Chicago suburb. The green surface was primarily Poa annua, with approximately 10 to 30% of creeping bentgrass (Agrostis stolonifera). The turf was mowed 6 days weekly to a height of 0.110-in. and fertilized with a total of 3 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. Six treatments were applied twice on a 28-day interval and five others three times on a 14-day interval. Application dates were 6 May, 20 May, and 2 Jun. Treatments were delivered using a CO2-powered backpack sprayer with 8004 TeeJet flat fan nozzles at 40 psi in water equivalent to 2 gal/1,000 ft2. Waitea symptoms were visually evaluated as percent and number of rings per plot. Microdochium symptoms were visually evaluated as number of infection centers per plot. Visual quality was also rated (1 to 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) to monitor for acceptable quality and quantify any phytotoxicity. At this site in 2008, 2009 and 2010, Waitea symptoms first occurred on 22 May, 18 May, and 25 May respectively. In all years, Waitea disease developed into June, but symptoms were absent in months thereafter. During autumn, Waitea is infrequently reported on Chicago greens for unknown reasons. Untreated plots saw peak disease development on 25 May with 13% damage by Waitea, and by 9 Jun disease symptoms naturally ended. Compared to the untreated control, all treatments reduced both Waitea percent and number except Daconil Ultrex and Harmonizer-alone. The remainder of fungicides tested allowed only trace levels (2% or less) of Waitea on all dates rated except Banner MAXX + Daconil Ultrex. A second disease, Microdochium patch, was reduced by all treatments except ProStar. Light applications of N (by urea) suppressed both Waitea and Microdochium. Visual quality indicated all treatments were safe and without phytotoxicity (>=6). On 25 May, Harmonizer-alone (affected by Waitea) and ProStar (affected by Microdochium) were similar to untreated plots by having acceptable visual quality (<6.0). The tendency of best visual quality on 25 May (7.8 to 8.5) was by the Civitas product combination, Tartan, and Tartan + Triton. These three treatments are a combination of broad-spectrum fungicides that also are formulated or mixed with a green pigment. N by urea provided good visual quality on 25 May (7.0)." |
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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):
Settle, D., T. Sibicky, and K. Rincker. 2011. Preventatvie control of brown ring patch and Microdochium patch on a Chicago Poa annua golf green, 2010. PDMR: Plant Dis. Manage. Rep. 5:p. T036. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T036.pdf
Last checked: 11/14/2016
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Access conditions: Item is within a limited-access website |
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