Full TGIF Record # 227127
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=287
    Last checked: 08/07/2013
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Publication Type:
i
Report
Author(s):Cox, M. C.; Askew, S.
Author Affiliation:Virginia Tech, Blacksburg, VA
Title:Selective bermudagrass control in cool-season turf with metamifop
Section:Graduate student contest
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Meeting Info.:Charleston, South Carolina: January 23-25, 2012
Source:2012 Proceedings, Southern Weed Science Society. Vol. 65, 2012, p. 215.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Ammonium nitrate; Application rates; Bermudagrass control; Comparisons; Cool season turfgrasses; Herbicide efficacy; Herbicide evaluation; Herbicide resistance; Metamifop; Selective weed control
Abstract/Contents:"Metamifop is an aryloxyphenoxypropionate herbicide marketed in several Asian countries for weed control in crops and is under evaluation in the US for selective grass weed control in turfgrass. Bermudagrass is listed among the most troublesome weeds of cool-season turfgrasses in most transition zone states. The difficulty of selective bermudagrass control in turf forces grounds managers to rely on herbicides that often injure cool-season turfgrasses. Fenoxaprop, fluazifop, triclopyr, and mesotrione are examples of such herbicides. Metamifop has not injured cool-season turfgrasses when used at rates much higher than needed for annual grass control, which is usually 0.20 to 0.40 kg ai ha-1. With the safety that metamifop has demonstrated in recent experiments, research is needed to determine if metamifop is an effective herbicide for controlling bermudagrass in cool-season turfgrass. The objectives of this study were to evaluate metamifop at 0.40 and 0.80 kg ai ha-1 for control of bermudagrass in tall fescue and Kentucky bluegrass and determine if the addition of ammonium nitrate (UAN) enhances metamifop efficacy. Two studies were conducted as randomized complete block designs with three replications at two locations on or near the Virginia Tech campus in Blacksburg, VA. All treatments were applied at 280 L ha-1 using Teejet flat fan 11004 nozzles at 262 kPa on June 27, 2011 initially at the Glade Road Research Facility (GR) and on July 20, 2011 initially at the Turfgrass Research Center (TRC). Metamifop was applied at 0.40 and 0.80 kg ai ha-1 with and without UAN at 1.5 kg ai ha-1. Fenoxaprop plus triclopyr was applied at 0.14 and 1.12 kg ai ha-1, respectively, as a standard comparison. Three applications were made at 3 week intervals for all herbicides. Turfgrasses included perennial ryegrass maintained at 3.8 cm infested with 3 to 30% bermudagrass at GR and Kentucky bluegrass maintained at 6.3 cm and infested with 50 to 90% bermudagrass at TRC. Metamifop applied at 0.80 kg ai ha-1 with and without the addition of UAN controlled bermudagrass equivalent to fenoxaprop + triclopyr and significantly better than metamifop applied at 0.40 kg ai ha-1 with and without UAN. The addition of UAN did not significantly enhance or inhibit metamifop efficacy. Perennial ryegrass and Kentucky bluegrass was not injured by metamifop at any time during the study. These data suggest that metamifop could potentially be an alternative to fenoxaprop + triclopyr for bermudagrass control in cool season turf, given that control is comparable between them but metamifop is less injurious to the turf."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cox, M. C., and S. Askew. 2012. Selective bermudagrass control in cool-season turf with metamifop. South. Weed Sci. Soc. Proc. 65:p. 215.
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http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=287
    Last checked: 08/07/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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