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Web URL(s): | http://www.newss.org/proceedings/proceedings-2014.pdf#page=51 Last checked: 10/05/2015 Requires: PDF Reader Notes: Item is within a single large file |
Publication Type:
| Report |
Author(s): | Venner, K. A.;
Askew, S. D.;
Koo, S. J. |
Author Affiliation: | Virginia Tech, Blacksburg, VA |
Title: | Interaction of ethephon and methiozolin on creeping bentgrass and annual bluegrass putting greens |
Section: | Graduate student presentations Other records with the "Graduate student presentations" Section
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Meeting Info.: | Philadelphia, Pennsylvania: January 6-9, 2014 |
Source: | Proceedings of the Sixty-eighth Annual Meeting of the Northeastern Weed Science Society. Vol. 68, 2014, p. 50. |
Publishing Information: | College Park, Maryland: The University of Maryland |
# of Pages: | 1 |
Keywords: | TIC Keywords: Agrostis stolonifera; Control methods; Ethephon; Golf green maintenance; Growth regulator evaluation; Herbicide combinations; Herbicide efficacy; Herbicide evaluation; Methiozolin; Percent living ground cover; Plant growth regulators; Poa annua control
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Trade Names: | PoaCure; Proxy |
Abstract/Contents: | "Methiozolin (PoaCure) is a new herbicide developed by the Moghu Research Center in Daejeon, Korea for safe and selective removal of annual bluegrass (Poa annua) from creeping bentgrass (Agrostis stolonifera) turf. Methiozolin is a member of the isoxazoline class of chemistry and has been shown to inhibit cell wall biosynthesis and tyrosine aminotransferase. Ethephon (Proxy) is a plant growth regulator which is used to temporarily suppress annual bluegrass seedheads. Previous research conducted on two Virginia golf courses indicated ethephon, when combined with methiozolin, may negatively impact efficacy for annual bluegrass control and creeping bentgrass response. Two studies were initiated in 2012 and 2013 to determine whether or not the addition of ethephon to methiozolin programs would influence annual bluegrass control and creeping bentgrass safety. The first trial was initiated on March 13, 2012 at Blacksburg Country Club (BBCC) in Blacksburg, Virginia on a mixed variety creeping bentgrass putting green. Sequential applications were made on April 16. The second trial was initiated on April 12, 2013 at the Virginia Tech Golf Course (VTGC) in Blacksburg, Virginia on a 'C-19 Congressional' creeping bentgrass putting green. Sequential applications were made on May 14. Methiozolin at 500, 1000 and 2000 g ai ha-1 was applied alone or with ethephon at 3818 g ai ha-1. A comparison treatment of 1000 g ai ha-1 methiozolin + 3818 g ai ha-1 ethephon+ 48 g ai ha-1 trinexapac-ethyl as well as an untreated check were also included. Initial annual bluegrass cover on the putting greens ranged from 48 to 74%. At 2 WAIT, annual bluegrass control at BBCC was 32% at 2000 g ai ha-1 versus 52% at the VTGC. Methiozolin applied at 500 and 1000 g ai ha-1 were not significantly different from one another at BBCC. At VTGC, methiozolin applied at 1000 g ai ha-1 controlled annual bluegrass more than 500 g ai ha-1. At 6 WAIT, or 2 weeks after the sequential application, annual bluegrass was controlled 89 to 90% with 1000 to 2000 g ai ha-1 and 37% with 500 g ai ha-1 methiozolin at BBCC. Annual bluegrass at the VTGC was controlled 90, 39 and 8% with 2000, 1000 and 500 g ai ha-1 methiozolin, respectively. Ethephon did not affect overall annual bluegrass control at this rating date. At 8 WAIT, addition of ethephon influenced methiozolin applications at the BBCC, but not at the VTGC. At the conclusion of the study, annual bluegrass was nearly completely controlled with all treatments with the exception of methiozolin applied at 500 g ai ha-1. No undesirable turfgrass injury was observed at the VTGC site in 2013 but severe creeping bentgrass injury was observed at BBCC in 2012. At 8 WAIT in 2012, methiozolin applied alone did not significantly injure bentgrass regardless of rate while combinations of ethephon with 1000 or 2000 g ai ha-1 methiozolin injured creeping bentgrass 23 and 80%, respectively. Injury occurred at BBCC when the sequential application was applied immediately following an aeration event. This phenomenon was not observed at the VTGC, as aeration did not occur during the course of the study. These data suggest that depending on site conditions and cultural practices, methiozolin and ethephon should not be applied together to avoid potential, undesirable turfgrass injury. Future research will be performed to address the effects aeration has on the interaction between methiozolin and ethephon on golf course putting greens." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Venner, K. A., S. D. Askew, and S. J. Koo. 2014. Interaction of ethephon and methiozolin on creeping bentgrass and annual bluegrass putting greens. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 68:p. 50. |
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| Web URL(s): http://www.newss.org/proceedings/proceedings-2014.pdf#page=51 Last checked: 10/05/2015 Requires: PDF Reader Notes: Item is within a single large file |
| MSU catalog number: SB 610 .N62 |
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