Full TGIF Record # 112292
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Web URL(s):http://www.newss.org/proceedings/proceedings_2006.pdf#page=95
    Last checked: 07/22/2013
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i
Report
Content Type:Abstract or Summary only
Author(s):Willis, J. B.; Ricker, D. B.; Askew, S. D.
Author Affiliation:Virginia Tech, Blacksburg, Virginia
Title:Selective bermudagrass control in cool-season turfgrass with mesotrione, triclopyr, and fenoxaprop
Section:Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
Meeting Info.:Providence, RI: January 3-6, 2006
Source:Proceedings: NortheasternWeed Science Society. Vol. 60, 2006, p. 90.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Cynodon; Cool season turfgrasses; Weed control; Application rates; Herbicide application; Herbicide resistance; Chlorosis; Selective weed control; Mesotrione; Triclopyr; Fenoxaprop-ethyl; Herbicide combinations
Abstract/Contents:"Once bermudagrass is established in cool-season turf, it is very difficult to control, and changes turf color and quality. Traditionally, infested areas are treated with nonselective herbicides followed by turfgrass renovation. Selective chemicals are not available for common bermudagrass control in cool-season turfgrass. Fenoxaprop (AcclaimTM) and triclopyr (TurflonTM) are labeled for bermudagrass suppression, however long term control varies and depends on many factors. Recent work has shown that sequential applications of mesotrione can selectively control bentgrass and nimblewill without injuring cool-season turfgrass. Previous efforts using mesotrione alone for bermudagrass control have been unsuccessful long-term. However applications of mesotrione are very injurious to bermudagrass, indicating potential for control. Our objective is to evaluate mesotrione combinatinos with known bermudagrass suppressors for selective bermudagrass control in cool-season turf. Two trials were conducted in 2005 on turfgrass maintained as golf fairways at 2 cm mowing height. The first trial was established on a 10-yr old stand of Vamont bermudagrass that had been overseeded with perennial ryegrass (Lolium perenne L.) and the second trial consisted of Kentucky bluegrass (Poa pratensis L.) infested with common bermundagrass on a fairway at the Virginia Tech golf course in Blacksburg. Cutting height in both trials was 3/4 inch. The experimental design was a randomized complete block with three replications. Treatments were arranged in a factorial with two application scenarios and seven treatments that consisted of three herbicides applied in all possible combinations. The herbicides were AcclaimTM, Turflon TM, and mesotrione at 28, 32, and 4 fluid ounces product per acre, respectively. The two application scenarios were treatments in both spring and fall applied either two or three times. A nontreated control was included for comparison, making a total of 15 treatments. The first spring treatment was applied at 60% bermudagrass greenup and successive applications were made at 3-weeks intervals. Fall applications were applied 9, 6, and 3 weeks prior to expected senescence. For all herbicides and combinations, three applications significantly reduced bermudagrass cover more than two applications. After spring applications, mesotrione was the most effective treatment when applied alone. For example when applied 3 times, mesotrione reduced bermudagrass cover by 45%. The most effective treatments two weeks after final application were triclopyr plus fenoxaprop (80% control), triclopyr plus mesotrione (93% control), and triclopyr plus fenoxaprop plus mesotrione (98% control), all applied three times fall and spring. Treatments injured Kentucky bluegrass and perennial ryegrass as much as 35%, however, injury was short lived, and turfgrass recovered about three weeks after application. Applications of mesotrione produce extremely chlorotic bermudagrass, essentially turning bermudagrass white and significanlty reducing color and quality ratings. Mesotrione plus TurflonTM plus Acclaim TM and mesotrione plus Turflon TM does not have this characteristic effect on bermudagrass. Thus, the three-way combination had higher turf color ratings than mesotrione alone while offering equivalent bermudagrass control."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Willis, J. B., D. B. Ricker, and S. D. Askew. 2006. Selective bermudagrass control in cool-season turfgrass with mesotrione, triclopyr, and fenoxaprop. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 60:p. 90.
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Web URL(s):
http://www.newss.org/proceedings/proceedings_2006.pdf#page=95
    Last checked: 07/22/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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