Full TGIF Record # 266184
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Web URL(s):http://www.newss.org/proceedings/proceedings-2015.pdf#page=57
    Last checked: 10/23/2015
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Publication Type:
i
Report
Content Type:Abstract or Summary Only
Author(s):Rana, S. S.; Askew, S. D.; Koo, S.
Author Affiliation:Askew: Vice President, NEWSS Executive Committee and Chair, NEWSS 2015 Program Committee and Collegiate Weed Contest Committee; Virginia Polytechnic Institute and State University, Blacksburg
Title:Roughstalk bluegrass control in creeping bentgrass and Kentucky bluegrass fairways
Meeting Info.:Williamsburg, Virginia: January 5-8, 2015
Source:Proceedings of the Sixty-ninth Annual Meeting of the Northeastern Weed Science Society. Vol. 69, 2015, p. 55.
Publishing Information:College Park, Maryland: The University of Maryland
# of Pages:1
Keywords:TIC Keywords: Agrostis stolonifera; Application timing; Chemical control; Comparisons; Control methods; Festuca arundinacea; Golf fairways; Herbicide evaluation; Lolium perenne; Methiozolin; Poa pratensis; Poa trivialis; Tank mix; Weed control
Cultivar Names:PoaCure; Roughstalk bluegrass
Abstract/Contents:"Roughstalk bluegrass (Poa trivialis) is one of the most troublesome weeds of creeping bentgrass (Agrostis stolonifera) and Kentucky bluegrass (Poa pratensis) fairways. Chemical control options for roughstalk bluegrass are limited in cool-season turf. Methiozolin (PoaCure) is a new isoxazoline herbicide under development by Moghu Research Center that has been reported in Virginia and Korea to control roughstalk bluegrass with safety to creeping bentgrass, perennial ryegrass (Lolium perenne), Kentucky bluegrass, and tall fescue (Schedonorus arundinaceus). Our objectives were to compare various application timings and tank mixtures of methiozolin for roughstalk bluegrass control in creeping bentgrass and Kentucky bluegrass fairways. Trials were initiated on October 22, 2013 on a creeping bentgrass fairway at the Pete Dye River Course of Virginia Tech (RC), Radford, VA and Highland Golf Course at Primland Resort (PR), Meadows of Dan, VA, and on a Kentucky bluegrass fairway at the Glade Road Research Facility (GR), Blacksburg, VA. Treatments consisted of methiozolin at 1000 or 1500 g ai/ha applied four times at two-week intervals in fall or spring or twice at two-week intervals in fall and spring; methiozolin at 1000 g/ha applied twice at two-week intervals in fall fb by methiozolin plus primisulfuron (26.3 g/ha) or amicarbazone (98 g/ha) applied twice at two-week intervals in spring; primisulfuron or amicarbazone applied twice at two-week intervals in spring; and bispyribac-sodium at 24.7 g/ha (only at creeping bentgrass sites) applied twice at twoweek intervals in fall and spring. Treatments also included a non-treated check for comparison. The interaction of location by treatment was insignificant for both roughstalk bluegrass control and turf cover, so data were pooled over locations for mean separation. One year after initial treatment (YAIT), fall and fall fb spring applications of methiozolin at 1500 g/ha controlled roughstalk bluegrass 83-89% and higher than methiozolin at 1000 g/ha at all applications timings, except fall applications of methiozolin fb methiozolin plus primisulfuron in spring. When tank-mixed with primisulfuron, methiozolin at 1000 g/ha controlled roughstalk bluegrass 88% and equivalent to fall or fall fb spring applications of methiozolin at 1500 g/ha. The high rate of methiozolin applied in fall controlled roughstalk bluegrass 89% and higher than the same rate of methiozolin applied in spring. Methiozolin did not injure the desired turf regardless of application rate and timing. Fall only and fall fb spring applications of methiozolin had a turf cover of 80-90% and equivalent to methiozolin tank-mixed with primisulfuron or amicarbazone, but higher than primisulfuron or amicarbazone alone, 1 YAIT. In conclusion, methiozolin at 1500 g/ha controls roughstalk bluegrass better than methiozolin at 1000 g/ha regardless of application timing. Fall applications generally improve roughstalk bluegrass control compared to spring applications only. And, when using the lower methiozolin rate, primisulfuron mixtures help in controlling roughstalk bluegrass equivalent to higher methiozolin rates."
Language:English
References:0
See Also:See also related article "Roughstalk bluegrass control in creeping bentgrass and Kentucky bluegrass fairways" Virginia Turfgrass Journal, May/June 2015, p. 28-29, R=260442. R=260442
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rana, S. S., S. D. Askew, and S. Koo. 2015. Roughstalk bluegrass control in creeping bentgrass and Kentucky bluegrass fairways. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 69:p. 55.
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http://www.newss.org/proceedings/proceedings-2015.pdf#page=57
    Last checked: 10/23/2015
    Requires: PDF Reader
    Notes: Item is within a single large file
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