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Web URL(s):https://journals.ashs.org/hortsci/view/journals/hortsci/43/2/article-p509.xml?rskey=C0D42Q
    Last checked: 11/20/2019
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Author(s):Dernoeden, Peter H.; Kaminski, John E.; Fu, Jinmin
Author Affiliation:Dernoeden and Fu: Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland; Kaminski: Department of Plant Science, University of Connecticut, Storrs, Connecticut
Title:Selective creeping bentgrass control in Kentucky bluegrass and tall fescue with mesotrione and triclopyr ester
Section:Turf management
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Source:HortScience. Vol. 43, No. 2, April 2008, p. 509-513.
# of Pages:5
Publishing Information:Alexandria, VA: American Society for Horticultural Science
Keywords:TIC Keywords: Agrostis stolonifera; Weed control; Poa pratensis; Festuca arundinacea; Mesotrione; Triclopyr; Herbicide evaluation; Application rates; Postemergence herbicides; Herbicide resistance; Herbicide injury
Abstract/Contents:"Creeping bentgrass (Agrostis stolonifera L.; CBG) is a common weed in home lawns and golf course roughs in many regions of the United States. Currently, no herbicides are registered for selective control of CBG in cool-season grasses. The objective of this field study was to evaluate the ability of mesotrione and triclopyr ester to selectively remove CBG from Kentucky bluegrass (Poa pratensis L.) and tall fescue (Festuca arundinacea Schreb.). Mesotrione (0.14 and 0.21 kg路ha-1 a.i.) and triclopyr ester (0.56 and 1.12 kg路ha-1 a.i.) were applied on a 2-week interval two, three, or four times in Connecticut and Maryland in 2005, and three or four times in Maryland in 2006. Two applications of mesotrione at 0.21 kg路ha-1 a.i. provided marginally acceptable CBG control, but three or four applications at 0.14 or 0.21 kg路ha-1 a.i. provided excellent CBG control. Mesotrione elicited little or no injury to Kentucky bluegrass, but generally caused objectionable injury in tall fescue for about 7 to 14 d after each application. Triclopyr applied at 0.56 kg路ha-1 a.i. reduced CBG cover, but the level of control generally was unacceptable, regardless of application frequency. Three or four applications of triclopyr (1.12 kg路ha-1 a.i.) effectively controlled CBG in Connecticut in 2005 and Maryland in 2006. Triclopyr caused no visual injury to tall fescue, regardless of rate or application frequency. Four triclopyr applications to Kentucky bluegrass, however, were phytotoxic and reduced stand density, especially at the high rate (1.12 kg路ha-1 a.i.). Three summer applications of mesotrione (0.14 kg路ha-1 a.i.) or triclopyr (1.12 kg路ha-1 a.i.) provided the best combination of turfgrass safety and CBG control. Chemical names used: [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acid (triclopyr ester); 2-[4-(methylsulfonyl)-2-nitrobenzoyl]-1,3-cyclohexanedione (mesotrione)."
Reprint appears in University of Connecticut College of Agriculture & Natural Resources 2008 Turfgrass Research Report, p. 105 with variant title "Selective removal of creeping bentgrass from Kentucky bluegrass with mesotrione and triclopyr", http://www.turf.uconn.edu/pdf/research/reports/2008.pdf#pa< >ge=107 |d 06/08/2009 |f Adobe Acrobat |n Document is within a single large file
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., J. E. Kaminski, and J. Fu. 2008. Selective creeping bentgrass control in Kentucky bluegrass and tall fescue with mesotrione and triclopyr ester. HortScience. 43(2):p. 509-513.
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DOI: 10.21273/HORTSCI.43.2.509
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    Last checked: 11/20/2019
    Requires: PDF Reader
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