Full TGIF Record # 112780
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Web URL(s):http://www.newss.org/proceedings/proceedings_2006.pdf#page=113
    Last checked: 07/22/2013
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Report
Content Type:Abstract or Summary only
Author(s):McCall, D. S.; Willis, J. B.; Ricker, D. B.; Askew, S. D.
Author Affiliation:Virginia Tech, Blacksburg, Virginia
Title:Selective tall fescue and quackgrass control in Kentucky bluegrass turf
Section:Turfgrass and plant growth regulators II
Other records with the "Turfgrass and plant growth regulators II" Section
Meeting Info.:Providence, RI: January 3-6, 2006
Source:Proceedings: NortheasternWeed Science Society. Vol. 60, 2006, p. 108.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Festuca arundinacea; Chlorsulfuron; Weed control; Herbicide application; Elymus repens; Selective weed control; Mesotrione; Flazasulfuron; Poa pratensis; Herbicide evaluation; Herbicide injury
Abstract/Contents:"Tall fescue (Festuca arundinacea Schreb.) is often used as the turfgrass of choice in many home lawns throughout the Mid-Atlantic region. However, when other turfgrass species or finer textured varieties are used, tall fescue can become an unsightly weed, due primarly to clumps formed by tillering. The current recommendation for tall fescue control in Kentucky bluegrass (Poa pratensis L.) is sequential applications of chlorsulfuron or spot-treatment with glyphosate. Quackgrass [Elytrigia repens (L.) Nevski] is similar in appearance to tall fescue but has a rhizomatous growth pattern, unlike tall fescue that grows in clumps by tillering. Chlorsulfuron does not selectively control quackgrass, leaving spot-treatment with glyphosate as the only control option. A trial was established on a Kentucky bluegrass soccer field infested with clumpy tall fescue and quackgrass in Covington, Virginia. Rates of flazasufluron were 4.37, 8.74, and 17.5 ai/ha. Three applications were made at 21-days intervals, beginning on April 28. Chlorsulfuron was applied once at 260 g ai/ha on April 28 as a comparison for tall fescue control. Flazasufluron at all rates tested completely controlled both tall fescue and quackgrass 19 days after the final application. Chlorsulfuron did not control either weeds species. Chlorsulfuron likely would have controlled tall fescue had sequential treatments been applied. Six days after the second flazasulfuron application, plots were rated of flazasulfuron, was 90, 98, and 99. Growth of Kentucky bluegrass was regulated, although no discoloration occured. At another site, flazasulfuron and mesotrione were tested for quackgrass control in Kentucky bluegrass. Applications were made on May 11 and May 27. Rates of flazasulfuron were the same as in the previous study. Mesotrione was applied at 0.28 kg ai/ha as a comparison for quackgrass control. Twenty-one days after the final treatment, the level of control was 81, 91, 93% as flazasulfuron rates in increased and 83% with mesotrione. However, by 44 days after the final application, the level of control had decreased to 59, 79, 89% for increasing flazasulfuron rates and 54% for mesotrione only the highest rate of flazasulfuron tested provided extended control of quackgrass. Results in this study indicated that both flazasulfuron and mesotrione had activity on quackgrass, but flazasulfuron caused far too much injury to Kentucky bluegrass to be commerically acceptable. Kentucky bluegrass cultivar, cultural practices between sites, later application timing, and shorter application interval may have contributed to the observed differences in Kentucky bluegrass injury flazasulfuron between the two trials."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McCall, D. S., J. B. Willis, D. B. Ricker, and S. D. Askew. 2006. Selective tall fescue and quackgrass control in Kentucky bluegrass turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 60:p. 108.
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http://www.newss.org/proceedings/proceedings_2006.pdf#page=113
    Last checked: 07/22/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 610 .N62 v. 60
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