Full TGIF Record # 223528
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Web URL(s):http://www.newss.org/proceedings/proceedings_2007.pdf#page=29
    Last checked: 06/28/2013
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Willis, J. B.; Askew, S. D.; McElroy, J. S.
Author Affiliation:Willis and Askew: Virginia Tech, Blacksburg; McElroy: Univ. of Tennessee, Knoxville
Title:Interaction of bensulide and carfentrazone for moss control on golf putting greens
Section:Research posters
Other records with the "Research posters" Section
Meeting Info.:Baltimore, Maryland: January 2-5, 2007
Source:Proceedings of the Sixty-First Annual Meeting of the Northeastern Weed Science Society. Vol. 61, 2007, p. 11.
Publishing Information:Baltimore, Maryland: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Agrostis stolonifera; Bensulide; Carfentrazone; Golf green maintenance; Herbicide evaluation; Herbicide injury; Interactions; Moss control
Abstract/Contents:"Carfentrazone was recently registered for moss control on creeping bentgrass (Agrostis stolonifera) putting greens. Previous results indicate that carfentrazone does not injure creeping bentgrass, however, reports from NC, TN, and VA blame carfentrazone for temporary injury to bentgrass putting greens. Putting greens had been previously treated with bensulide prior to carfentrazone treatment in several of these injury cases. Studies were conducted in Blacksburg, VA and Knoxville, TN to evaluate bensulide with carfentrazone applied in sequence to creeping bentgrass on USGA specification sand-based putting greens. The VA experiment is summarized below. A split plot experimental design was used with three replications and a 3 by 8 factorial arrangement of treatments. Main plots were: bensulide at 6.25 lbs ai/A followed by bensulide at 6.25 lbs ai/A at a 14-day interval, bensulide at 12.5 lbs ai/A, and no bensulide. Subplots were carfentrazone applied 0, 1, 3, 7, 14, 21, and 28 days after bensulide (DAB), and no carfentrazone application. Bensulide applications were incorporated with irrigation immediately after application and all carfentrazone applications included 0.25% nonionic surfactant. Although creeping bentgrass in plots treated with bensulide alone was not injured, bensulide increased severity and duration of creeping bentgrass injury when carfentrazone was applied at 0, 1, and 3 days later. For example, carfentrazone applied 0, 1, and 3 days after either rate of bensulide injured creeping bentgrass on average 80, 91, and 18%, respectively 3 days after carfentrazone treatment (DAT) and 74, 82, and 34%, respectively 7 DAT. Creeping bentgrass injury was not greater than 12% 14 DAT from any treatment except carfentrazone applied 0 and 1 DAB, which injured creeping bentgrass 22 and 20%, respectively. Carfentrazone applied beyond 3 DAB did not significantly injure creeping bentgrass. Thus, from this single experiment we can tentatively conclude that carfentrazone treatment should be separated from bensulide treatment by at least 7 days. An unexpected result of this experiment was creeping bentgrass injury by carfentrazone alone. When applied at 0 and 1 d after bensulide was applied to other plots, carfentrazone alone injured creeping bentgrass 53 and 78%, respectively 3 DAT and 32 and 60%, respectively, 7 DAT. These treatments did not significantly injure creeping bentgrass at 14 DAT or beyond and no other timing of carfentrazone alone injured creeping bentgrass. The general trend of more injury earlier in the study is suspicious, especially since no previous researchers had observed significant injury to creeping bentgrass from carfentrazone alone. All injury in this experiment consisted of a rapid desiccation that is similar in appearance to sun scorch. A rain event of 0.75 inches occurred 3 days prior to the 0 DAB carfentrazone treatment and the green was irrigated to incorporate the bensulide treatment 4 hours prior to the 0 DAB carfentrazone treatment. Consequently, the root zone was more saturated than normal at the 0 and 1 DAB timings and days were clear and sunny. We plan to continue this work by evaluating moisture and creeping bentgrass cultivar influence on injury due to carfentrazone."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Willis, J. B., S. D. Askew, and J. S. McElroy. 2007. Interaction of bensulide and carfentrazone for moss control on golf putting greens. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 61:p. 11.
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http://www.newss.org/proceedings/proceedings_2007.pdf#page=29
    Last checked: 06/28/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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