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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2008.pdf#page=75
Last checked: 07/16/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Dernoeden, P. H.;
Fu, J. |
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| Author Affiliation: | University of Maryland, College Park |
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| Title: | Preemergence yellow nutsedge control in spring seeded tall fescue |
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| Section: | Turfgrass and plant growth regulators I
Other records with the "Turfgrass and plant growth regulators I" Section
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| Meeting Info.: | Philadelphia, Pennsylvania: January 7-10, 2008 |
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| Source: | Proceedings of the Sixty-Second Annual Meeting of the Northeastern Weed Science Society. Vol. 62, 2008, p. 57. |
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| Publishing Information: | Baltimore, Maryland: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cyperus esculentus; Festuca arundinacea; Herbicide efficacy; Herbicide evaluation; Preemergence weed control
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| Abstract/Contents: | "Yellow nutsedge (Cyperus esculentus) (CYPES) is a common weed in turfgrass, which generally is controlled postemergence. Yellow nutsedge can be an aggressive competitor in spring seeded turfgrass and using a herbicide safely and effectively to control this weed at the time of seeding would be advantageous. In this study, three herbicides were applied at the time of seeding a stand of tall fescue (Festuca arundinacea) (TF) in spring 2007. The site was treated with glyphosate on 5 April and disk-seeded to Cochise III TF on 10 April 2007. The herbicides were applied preemergence to both TF and CYPES on 20 April and sequential applications of some treatments were made 21 May 2007. The herbicides and rates evaluated were as follows: mesotrione (0.25, 0.125 + 0.125, and 0.187 + 0.187 lb ai/A); sulfentrazone (0.25 and 0.125 + 0.125 lb ai/A); and a pre-packaged mixture of sulfentrazone + prodiamine (0.57 and 0.75 lb ai/A). Soil was a Keyport silt loam with a pH of 5.7 and 2.1% OM. Turf was maintained at a height of 2.5 inches and the site was irrigated frequently during summer to prevent drought stress. Herbicides were applied in 50 GPA using a CO2 pressurized (35 psi) backpack sprayer equipped with an 8004 flat fan nozzle. Plots were 5 ft by 5 ft and arranged in a randomized complete block with four replications. Tall fescue and CYPES cover were assessed visually on a linear 0 to 100% scale where 0 = no CYPES or TF and 100 = entire plot area covered with CYPES or TF. Data were subjected to the analysis of variance and significantly different means were separated using Fisher's LSD test at Pā¤0.05. Tall fescue seedlings and shoots of CYPES emanating from tubers began emerging in late April and early May 2007. In plots treated with mesotrione, CYPES shoots emerged and turned white and many plants died over a period of weeks. In plots treated with sulfentrazone and sulfentrazone + prodiamine, emerging shoots of CYPES were not observed. On 31 May, 10 days had passed since sequential applications were made and all treatments had reduced CYPES levels. Plots treated with sulfentrazone and sulfentrazone + prodiamine had lower CYPES levels than plots treated with mesotrione on 31 May. By 1 August, plots treated with mesotrione at 0.125 + 0.125 and 0.187 + 0.187 lb ai/A (3 to 11% CYPES co ver) had CYPES levels statistically equivalent to sulfentrazone and sulfentrazone + prodiamine (trace to 10% CYPES cover). Plots treated with sulfentrazone at 0.125 + 0.125 lb ai/A, however, were almost free of CYPES on 1 August. While sulfentrazone and sulfentrazone + prodiamine provided effective preemergence CYPES control, they adversely affected TF seedling emergence. On 1 August, sulfentrazone-treated plots had 48 to 70% TF cover; whereas, plots treated with sulfentrazone + prodiamine had only 8 to 18% TF cover. Conversely, mesotrione had no adverse effects on TF seedlings and plots treated twice at 0.125 and 0.187 lb ai/A achieved 72 to 85% TF cover by 8 June, respectively, and retained this cover level the entire summer." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and J. Fu. 2008. Preemergence yellow nutsedge control in spring seeded tall fescue. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 62:p. 57. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2008.pdf#page=75
Last checked: 07/16/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 |
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