Full TGIF Record # 225691
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2008 Proceedings-SWSS.pdf#page=267
    Last checked: 07/24/2013
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Publication Type:
i
Report
Author(s):Gannon, T. W.; Yelverton, F. H.; Warren, L. S.
Author Affiliation:Department of Crop Science, North Carolina State University, Raleigh
Title:Effect of simulated rainfall on tall fescue control with glyphosate
Section:Weed management in turf
Other records with the "Weed management in turf" Section
Meeting Info.:Jacksonville, Florida: January 27-30, 2008
Source:2008 Proceedings, Southern Weed Science Society. Vol. 61, 2008, p. 114.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Festuca arundinacea; Glyphosate; Herbicide efficacy; Herbicide evaluation; Rain impact
Trade Names:Roundup
Abstract/Contents:"Glyphosate is a non-selective foliar applied herbicide widely used in agriculture. In turfgrass environments, glyphosate is commonly broadcast applied prior to renovation or in select dormant turfgrass species and depends on foliar absorption for desired efficacy as it possesses little, if any, soil activity. Postemergence herbicide applications carry the risk of reduced efficacy if rainfall occurs before adequate drying time has lapsed. Current labels for glyphosate including Roundup Original®, Roundup Pro®, and Roundup ProDry® only allude to rainfastness by stating "heavy rainfall soon after application may wash this product off of the foliage and a repeat application may be required for adequate control" and give no specific indication of rainfree period required for acceptable herbicide efficacy. Field experiments were conducted to determine the effect of simulated rainfall after glyphosate application on tall fescue control. Three glyphosate formulations, three simulated rainfall amounts, two application rates, and three rainfree periods were evaluated. Evaluated glyphosate formulations included Roundup Original®, Roundup Pro®, and Roundup ProDry®. Herbicide-drying periods, or rainfree intervals, included 15, 30, or 60 minutes. Simulated rainfall amounts were 0, 0.1, or 0.25 in. Application rates of glyphosate were 4 or 8 lb ai/a. These data indicate glyphosate applied at 4 or 8 lb/a may be more rainfast on tall fescue than previous research or current labels suggest. These data suggest when 60 rainfree minutes were provided between glyphosate application and simulated rainfall, excellent (>= 90%) tall fescue control was achieved. Additionally, when only 30 rainfree minutes were provided, good (>= 80%) tall fescue control was achieved indicating critical rainfree periods may be less than current product labels suggest."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gannon, T. W., F. H. Yelverton, and L. S. Warren. 2008. Effect of simulated rainfall on tall fescue control with glyphosate. South. Weed Sci. Soc. Proc. 61:p. 114.
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Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2008 Proceedings-SWSS.pdf#page=267
    Last checked: 07/24/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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