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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2012/T031.pdf
Last checked: 11/14/2016
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| Publication Type:
| Report |
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| Author(s): | Popko, J.;
Campbell-Nelson, K.;
Jung, G. |
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| Author Affiliation: | Dept. of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA |
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| Title: | Brown patch control on a colonial bentgrass and annual bluegrass fairway, 2011 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 6, 2012, p. T031. |
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| Publishing Information: | St. Paul, Minnesota: American Phytopathological Society |
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| # of Pages: | 2 |
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| Related Web URL: | http://www.plantmanagementnetwork.org/pub/trial/PDMR/volume6/abstracts/T031.asp
Last checked: 04/30/2012
Access conditions: Document is within a limited-access website
Notes: Summary only |
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| Keywords: | TIC Keywords: Agrostis tenuis; Dollar spot; Fungicide evaluation; Golf fairways; Metconazole; Penthiopyrad; Poa annua; Rhizoctonia blight; Sclerotinia homoeocarpa; Siduron
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| Cultivar Names: | Astoria |
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| Trade Names: | Tourney; Velista |
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| Abstract/Contents: | "This trial was conducted at the Joseph Troll Turf Research Center in South Deerfield, MA to evaluate fungicide treatments for control of brown patch under natural disease conditions. In total, two field trials were carried out and utilized the same experimental design. The second trial was needed because insufficient brown patch damage was present in the first trial. All descriptions of the experimental procedures were applied to both field trials, unless otherwise noted. The trial area consisted of colonial bentgrass and annual bluegrass maintained under fairway conditions; mowed at a height of 0.5-in. three times per week with the clippings removed. The soil type was a Hadley silt loam. A granular fertilizer (15-15-15) was applied at a rate of 1.0 lb nitrogen (N)/1,000 ft2 on 22 Apr and 17-0-17 was applied at a rate of 1.0 and 2.0 lb N/1,000 ft2 on 13 and 31 May, respectively. Tupersan 50WP was applied 10 May to control crabgrass at a rate of 24.0 lb/A. Sevin SL was applied at a rate of 4.0 fl oz/1,000 ft2 on 1 Jun to control cutworms. The site was irrigated as needed to prevent drought stress. Individual plots measured 3 ft x 6 ft with a 1-ft buffer strip and were arranged in a randomized complete block design with three replications in trial #1. Treatments were applied according to label or suggested rates, and initiated on 1 Jun continuing at 14-day intervals until 15 Aug. A second trial (trial #2) was initiated due to insufficient brown patch severity observed in trial #1. Trial #2 was similar to the first, but lacking buffer strips. Curative treatments were applied at the same rates as previously mentioned and were made on 3 and 17 Aug. All individual treatments were applied at a nozzle pressure of 40 psi using a CO2-pressurized boom sprayer equipped with two XR TeeJet 8004VS nozzles in the equivalent of 2.0 gallons of water per 1,000 ft2. Percent area per plot expressing brown patch symptoms was assessed weekly in both trials. Dollar spot infection centers were also counted on 20 and 27 Jul, and 3 and 17 Aug for trial #1 and on 3 and 17 Aug for trial #2. All brown patch and dollar spot ratings were subjected to analysis of variance and means were separated using Fisher's protected least significant difference test. All rating dates in which brown patch symptoms were more than 6% for a single treatment are listed in the first table. Disease pressure was low in trial #1 and brown patch symptoms were not observed until 3 Aug. A significant treatment effect occurred on 10 Aug where all fungicide treatments reduced brown patch symptoms compared to the untreated control. Brown patch disease pressure was moderate in trial #2. All fungicide treatments provided good to excellent curative brown patch control compared to the untreated control 14 days after treatment. A severe dollar spot epidemic developed late July/early August and was evaluated in both trials. Significant treatment effects were observed on four rating dates in trial #1. Both rates of Velista completely controlled dollar spot on 20 and 27 Jul; however, a moderate amount of breakthrough was observed on 17 Aug. Both rates of IKF-205 did not control dollar spot and the higher rate had significantly more dollar spot than the untreated control on 27 Jul. Tourney was the only treatment to provide complete control on all rating dates in trial #1. Both rates of Velista and Tourney provided excellent curative dollar spot control compared to IKF-205 treatments and the untreated control. No phytotoxicity was observed in any of the fungicide treatments throughout the course of the study." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Popko, J., K. Campbell-Nelson, and G. Jung. 2012. Brown patch control on a colonial bentgrass and annual bluegrass fairway, 2011. PDMR: Plant Dis. Manage. Rep. 6:p. T031. |
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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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