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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2008/T043.pdf
Last checked: 11/11/2016
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| Publication Type:
| Report |
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| Author(s): | Uddin, W.;
Benelli, J.;
Yenez, J. |
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| Author Affiliation: | Department of Plant Pathology, The Pennsylvania State University, University Park, PA |
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| Title: | Evaluation of fungicides for control of gray leaf spot in perennial ryegrass turf, 2007 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 2, 2008, p. T043. |
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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: Disease control; Fungicide efficacy; Fungicide evaluation; Gray leaf spot; Lolium perenne; Pyricularia grisea
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| Cultivar Names: | Legacy II |
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| Abstract/Contents: | "The study was conducted at the Valentine Turfgrass Research Center, University Park, PA, on perennial ryegrass maintained under golf course fairway management conditions, and mowed three times per week at 1.0-in. cutting height. The soil was Hagerstown silt loam with pH 6.8. The experimental turf area was fertilized with 1.0 lb nitrogen (IBDU) and 1.0 lb nitrogen (18-9-18) and per 1000 sq ft on 5 Jun. Scimitar (7.5 fl oz/A) was applied for cutworms on 8 May. Additionally, 0.1 lb nitrogen (Urea 46-0-0) was applied on 1 Aug. Treatment plots, 3 ft Π6 ft, were arranged in a randomized complete block design with three replications. Treatments were applied with a CO2-powered sprayer using a TeeJet 11008E nozzle at 40 psi, in water equivalent to 2 gal per 1000 sq ft. Treatments applications were made 25 Jul, 8 and 22 Aug, and 5 Sep, for 14-day intervals. The experimental turf area was inoculated with M. oryzae on 9 Aug. The turf was maintained at a 2.0-in. cutting height following the inoculation, and mowed once a week. Disease severity was assessed on 21 and 28 Aug, and 4 and 11 Sep using a disease severity index of 0 to 10 (0=turf asymptomatic; 10=>90% turf area symptomatic). Data were subjected to analysis of variance and multiple comparisons of the mean values were made using the Waller-Duncan k-ratio test (k=100). Conditions were conducive for gray leaf spot development in Aug 2007, and necrotic lesions on leaf blades developed 7 days after inoculation. Blighting of leaf blades and the entire plants followed with 3 days after development of necrotic lesions on blades. The first disease assessment was made on 21 Aug when disease progress in untreated control plots reached a mean of disease severity index of 3. On 21 Aug, almost all treatments provided good to excellent control of the disease. There was no gray leaf spot development in plots treated with Tartan II (1.9 oz), Disarm (0.36 oz), and ARY 0534002 (0.6 fl oz), and Lynx (1.5 oz), and trace of disease was noted in plots treated with Daconil Ultrex (3.2 oz), Tartan II (1. 0 and 1.3 oz), Nativo (0.6 and 1.2 oz), Headway (0.7 oz), and Disarm (0.18 oz), Lynx (1.0 oz). Disease severity gradually increased over time during the course of the experiment reaching almost 70% of turf area symptomatic in untreated control plots." |
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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):
Uddin, W., J. Benelli, and J. Yenez. 2008. Evaluation of fungicides for control of gray leaf spot in perennial ryegrass turf, 2007. PDMR: Plant Dis. Manage. Rep. 2:p. T043. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2008/T043.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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