Full TGIF Record # 139334
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Web URL(s):http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2008.pdf#page=34
    Last checked: 12/10/2013
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Wilson, Robert G.; Nissen, Scott J.; Enloe, Stephen
Author Affiliation:Wilson: University of Nebraska, Scottsbluff, Nebraska; Nissen: Colorado State University, Fort Collins, Colorado; Enloe: Auburn University, Auburn, Alabama
Title:Canada thistle control from combinations of aminopyralid and perennial grasses
Section:Project 1: Weeds of range and forest
Other records with the "Project 1: Weeds of range and forest" Section
Meeting Info.:Anaheim/Garden Grove, California: March 11-13, 2008
Source:Proceedings of the Western Society of Weed Science. Vol. 61, 2008, p. 34.
# of Pages:1
Publishing Information:Newark, CA: Western Society of Weed Science
Keywords:TIC Keywords: Perennial grasses; Aminopyralid; Cirsium arvense; Weed control; Application timing; Application rates; Competition; Seeding; Competitive ability; Quality evaluation
Abstract/Contents:"Experiments were conducted near Scottsbluff, NE, Ft. Collins, CO, and Laramie, WY from 2005 through 2007 to determine the efficacy of aminopyralid alone or in combination with perennial grasses for Canada thistle control. The experiment at each site consisted of five treatments: aminopyralid applied at 122 g ae/ha either in the fall of 2005 or spring of 2006, aminopyralid applied in the spring or fall plus a dormant seeding of perennial grasses during the winter of 2005/2006, or a treatment that received no aminopyralid. Plot size varied between 3.5 to 6 m wide by 11 to 14 m long and treatments were replicated four times. Each plot seeded to perennial grasses was split in half and half the plot was seeded with a mixture of introduced forage grasses and half with a mixture of native grasses. At Nebraska and Colorado the introduced mixture consisted of Luna pubescent wheatgrass, Oahe intermediate wheatgrass and Bozoisky Russian wild rye at a ratio of (4:3:1) while the native mixture was composed of western wheatgrass, slender wheatgrass, sideoats grama, and alkali sacaton at a ratio of (2:2.5:2.5:1) with both mixtures seeded at 9 kg of PLS/ha. At the Wyoming site the introduced mixture was composed of Luna pubescent wheatgrass, smooth brome, and Bozoisky Russian wild rye at a ratio of (4:3:1) while the native mixture was composed of needle-and-thread grass, Nazpar indian ricegrass, Critana thickspike wheatgrass, and alkali sacaton at a ratio of (2:2.5:2.5:1) with both mixtures seeded at 9 kg of PLS/ha. At the Nebraska site perennial grasses became established during the spring of 2007 and by late summer biomass averaged 560 kg/ha (dry wt) in seeded plots and by the end of the 2007 growing season had increased to 3600 kg/ha. At the Colorado and Wyoming sites spring and summer rainfall was lacking and grasses did not emerge until the spring of 2007. At the end of the 2007 growing season perennial grass biomass averaged 1390 and 280 kg/ha for the Colorado and Wyoming sites, respectively. In the fall of 2006 Canada thistle control was 55 and 79%, respectively for aminopyralid application the previous fall (2005) or spring (2006). By 2007 Canada thistle control had improved at all sites and averaged 70 and 99% respectively, for aminopyralid treatments applied in the fall (2005) or spring (2006). Perennial grass establishment in combination with aminopyralid treatment enhanced Canada thistle control at both the Nebraska (2006 and 2007) and Colorado (2007) sites. In order to determine the sustainability of Canada thistle control with perennial grass competition these sites will continue to be evaluated for the next 2 years."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wilson, R. G., S. J. Nissen, and S. Enloe. 2008. Canada thistle control from combinations of aminopyralid and perennial grasses. Proc. West. Soc. Weed Sci. 61:p. 34.
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http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2008.pdf#page=34
    Last checked: 12/10/2013
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    Notes: Item is within a limited access website
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