Full TGIF Record # 224544
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Web URL(s):http://www.newss.org/proceedings/proceedings_2008.pdf#page=19
    Last checked: 07/15/2013
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Publication Type:
i
Report
Author(s):Willis, J. B.; Askew, S. D.
Author Affiliation:Virginia Tech, Blacksburg
Title:Effects of triketone herbicides on seeded perennial ryegrass and Kentucky bluegrass
Section:Research posters
Other records with the "Research posters" Section
Meeting Info.:Philadelphia, Pennsylvania: January 7-10, 2008
Source:Proceedings of the Sixty-Second Annual Meeting of the Northeastern Weed Science Society. Vol. 62, 2008, p. 1.
Publishing Information:Baltimore, Maryland: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Establishment; Herbicide efficacy; Herbicide evaluation; Lolium perenne; Mesotrione; Poa pratensis; Tembotrione; Topramezone; Triketones; Weed control
Trade Names:Tenacity
Abstract/Contents:"Initial screenings of topramezone and tembotrione revealed turfgrass toleranceand weed control comparable to mesotrione (Tenacity™). Mesotrione will be the firstHPPD inhibitor registered for use in turf and offers both preemergent and postemergentbroad-spectrum weed control andweed control options during establishment of cool-season turfgrass. Our objectives are todetermine the usefulness of topramezone and tembotrione during establishment of cool-season turfgrass. Three trials were conducted in Blacksburg, VA to evaluate rates and sequential treatments of topramezone and tembotrione during establishment of Kentucky bluegrass (Poa pratensis L.) (KBG) and perennial ryegrass (Lolium perenne) (PR). Two trials were seeded September 6, 2007 with PR and KBG at the Glade Road Research Facility and one trial was strip seeded with PR and KBG on October 11, 2007 at the Turfgrass Research Center. Trials at the Glade Road Research Facility were mown three times per week at 0.6 inches and the trial at the Turfgrass Research Center was mown once per week at 2.5 inches.Treatments were topramezone at 0.016 and 0.05 lb ai/A, tembotrione at 0.12 and 0.37 lb ai/A, mesotrione at 0.25 lb ai/A, quinclorac at 0.56 lb ai/A, and siduron at 6 lb ai/A each applied at seeding and at seeding with a 4 week after emergence sequential treatment. Weed control, turfgrass injury and color were all evaluated over the course of the trials. Topramezone and tembotrione when applied at seeding of Kentucky bluegrass did not cause turf injury. These herbicides controlled smooth crabgrass (Digitaria ischaemum), dandelion (Taraxacum officinale), henbit (Lamium amplexicaule), chickweed (Stellaria media), and broadleaf plantain (Plantago major). Mesotrione and tembotrione both injured perennial ryegrass when applied at seeding while topramezone, siduron, and quinclorac injured PR less than 20%. Only topramezone reduced establishment of PR by reducing turf cover 30%. Sequential treatments of quinclorac, mesotrione, tembotrione, and topramezone discolored Kentucky bluegrass as much as 26, 76, 83, and 29%, respectively and perennial ryegrass as much as 19, 75, 89, and 55%, respectively depending on rate. Injury by these postemergence treatments was transient, occurring 4 days after treatment and lasting an additional 3 weeks. Previous trials with these herbicides applied to mature turfgrass have rarely resulted in turfgrass injury in excess of 30%. Although more studies are needed, tembotrione and topramezone appear to be suited for use in cool-season turfgrass in ways similar to that of mesotrione."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Willis, J. B., and S. D. Askew. 2008. Effects of triketone herbicides on seeded perennial ryegrass and Kentucky bluegrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 62:p. 1.
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http://www.newss.org/proceedings/proceedings_2008.pdf#page=19
    Last checked: 07/15/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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