Full TGIF Record # 227340
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=97
    Last checked: 08/12/2013
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Author(s):Koh, K.; Moss, J.
Author Affiliation:Oklahoma State University, Stillwater, OK
Title:Annual bluegrass√Ę control in bentgrass golf green with methiozolin
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Meeting Info.:Houston, Texas: January 28-30, 2013
Source:Proceedings of the Southern Weed Science Society: 66th Annual Meeting. Vol. 66, 2013, p. 10.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Agrostis stolonifera; Control methods; Golf greens; Herbicide efficacy; Methiozolin; Plant growth regulators; Poa annua control; Postemergence herbicides
Abstract/Contents:"Creeping bentgrass (Agrostis stolonifera L.) is widely used for golf putting greens because it tolerates frequent mowing at low mowing height and endures traffic and wear. Despite the technical improvement in turfgrass cultural practices and chemical weed control products, turfgrass managers are being challenged to maintain quality golf greens throughout the year. Annual bluegrass (Poa annua L.)is the most problematic weed in creeping bentgrass golf green. Annual bluegrass reduces not only visual quality, but also playability for the golfers. Currently, there is no selective post-emergence herbicide available for controlling annual bluegrass in creeping bentgrass golf greens. In addition, there are few pre-emergence herbicides labeled for annual bluegrass control in creeping bentgrass golf greens. Plant growth regulators (PGRs) such as flurprimidol and paclobutrazol have been used as alternative options for turf managers to suppress annual bluegrass, but complete annual bluegrass control is difficult to achieve. The objectives of this study were to evaluate methiozolin as a pre and post-emergence herbicide for annual bluegrass control and to evaluate the safety of methiozolin on creeping bentgrass putting greens in spring and fall. This study was conducted in Stillwater, OK at the Oklahoma State University Turfgrass Research Center. Plots (91cm x 151cm) were arranged on a 'Penncross' creeping bentgrass putting green with four replications. Methiozolin at different rates (0.25, 0.50, 0.75 and 1.0g ai ha-1) and application intervals (7, 14, or 28 days) was treated to compare with bensulide, siduron, bensulide + oxadiazon, and dithiopyr at labeled rates. Percent weed control and percent weed cover were assessed visually and phytotoxicity was evaluated by the Greenseeker handheld sensor as well as visual assessment. Spring only post-emergence methiozolin treatments provided inconsistent annual bluegrass control. None of the treatments controlled the weed effectively. However, pre-emergent methiozolin treatments in fall 2012 significantly decreased percent weed cover when compared to the other tested herbicides as well as untreated control. NDVI data revealed that there was no unacceptable herbicide injury from the treatments in spring 2012. However, significant visual injury was observed in bensulide + oxadiazon treated plots in fall 2012. The herbicide injury increased in methiozolin treated plots as temperature decreased towards the end of the fall season."
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Koh, K., and J. Moss. 2013. Annual bluegrass√Ę control in bentgrass golf green with methiozolin. South. Weed Sci. Soc. Proc. 66:p. 10.
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Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=97
    Last checked: 08/12/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: b2207931
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