Full TGIF Record # 162821
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Web URL(s):http://www.newss.org/proceedings/proceedings_2010.pdf#page=91
    Last checked: 07/22/2013
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):McDonald, S.
Author Affiliation:Turfgrass Disease Solutions, LLC, Spring City, PA
Title:Canada thistle control in first year hard fescue
Meeting Info.:Cambridge, MA: January 4-7, 2010
Source:Proceedings: 64th Annual Meeting of the NortheasternWeed Science Society. Vol. 64, 2010, p. 75.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Cirsium arvense; Festuca ovina subsp. duriuscula; Herbicide efficacy; Herbicide evaluation; Postemergence weed control
Cultivar Names:Aurora Gold
Abstract/Contents:"Three separate field trials were conducted during 2008 and 2009 to evaluate various herbicides for early post emergent control of Canada thistle (Cirsium arvense) in the spring following an autumn seeding of 'Aurora Gold' Hard Fescue. Al sites were mown once during the trial period. All treatments were applied in late April of each year. In 2008, the first trial evaluated granular formulations of DPX-KJM44-082, DPX-KJM440-87 (at rates from 0.0703-0.0938 lb ai/A or 125-165 lb product/A; KJM), DPX-MAT28-036, DPX-MAT28-035 (at rates ranging from 0.0703-0.1 lb ai/A or 78.81-112 lb product/A; MAT) and Momentum Force at 156.8 lb product/A (2,4-D; MCPA, and dicamba) and liquid sprayable formulations of DPX-KJM44 (0.0703 or 1.5 fl oz product/A), DPX-MAT28 (0.0703 lb ai/A or 4.5 fl oz product/A) and Confront (triclopyr and clopyralid) at 32 fl oz product/A. Treatments were applied to dry foliage on Canada thistle plants with 6-8 leaves. Most granular formulations of KJM and MAT provided up to 85% Canada thistle control which was significantly higher than that other granular material included (Momentum Force). The sprayable treatments provided a high level of control up to 60 days following treatment and were much quicker in their activity on Canada thistle, when compared to the granulars. KJM44 is aminocyclopyrachlor-methyl and MAT28 is aminocyclopyrachlor. No herbicide injury was observed to the hard fescue on any rating date. Another trial was conduced in 2008 which evaluated post-emergent control of Canada thistle with mesotrione (Tenacity 4SC) applied three times at 0.156 lb ai/A or twice at 0.25 al ai/A on either a 22 day interval or 42 day interval. Other herbicide treatments included were: Confront at 32 fl oz product/A, Speedzone Southern (carfentrazone, 2, 4-D, MCPP, dicamba) at 68 fl oz product/A and Lontrel at 10.8 fl oz product/A (0.246 lb ai/A). Mesotrione provided the highest level of Canada thistle control when applied at 0.25 lb ai/A twice on a 22 day interval. At rates less that 0.25 lb ai/A or on a longer interval, an unacceptable level of control was observed. Confront, Speedzone Southern, and Lontrel were very effective in reducing thistle populations in a heavily infested hard fescue stand. No herbicide injury was observed to hard fescue. In 2009, Imprelis2SL (aminocyclopyrachlor) was evaluated at rates ranging from 0.0469 lb ai/A to 0.0938 (3.0-6.0 fl oz product/A) and Imprelis50SG was evaluated at 0.703 lb ai/A (2.25 oz product/A). The standard treatment was Confront at 32 fl oz product. Granular treatments of MAT28-070, MAT28-071, and Momentum Force were also included at similar rates mentioned above. All MAT treatments, both sprayable and granular, provided high level control of Canada thistle (>80%). Momentum Force did not provide commercially acceptable levels of Canada thistle control. The granular MAT28 treatments were much slower, when compared to the sprayable treatments of Imprelis and Confront and took greater than 45 days to provide greater than 80% control. The high level of control was still observed at 87 days following treatment with the granular materials and was similar to the sprayable treatments of Imprelis and Confront."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McDonald, S. 2010. Canada thistle control in first year hard fescue. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 64:p. 75.
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http://www.newss.org/proceedings/proceedings_2010.pdf#page=91
    Last checked: 07/22/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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