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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2006.pdf#page=100
Last checked: 07/22/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Askew, S. D.;
Willis, J. B. |
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| Author Affiliation: | Virginia Tech, Blacksburg, Virginia |
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| Title: | Carfentrazone for selective star-of-Bethlemhem control |
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| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
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| Meeting Info.: | Providence, RI: January 3-6, 2006 |
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| Source: | Proceedings: NortheasternWeed Science Society. Vol. 60, 2006, p. 95. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Ornithogalum umbellatum; Weed control; Herbicide resistance; Herbicide application; Weed resistance to herbicides; Dicamba; Carfentrazone; Bromoxynil; Festuca arundinacea; Selective weed control; Herbicide combinations
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| Abstract/Contents: | "Star-of-Bethlehem (Ornithogalum umbellatum, L.) is a bulbous perennial that resist mowing and is difficult to control. Plants reproduce primarily by small bulbs that are spread by plowing and watershed. Plants are poisonous and disrupt turfgrass uniformity and reduce sod value. Star-of-Bethlehem is tolerant to most herbicides, including glyphosate, and research at Virginia Tech has tested over 30 chemicals for its control in the past five years. Early research suggest that Gramoxone (paraquat) applied twice at 2.5 to 3 pints per acre effectively controls star-of-Bethlehem. However, selective control measures are still not available. Our work suggests that high rates of dicamba may control the majority of star-of-Bethlehem plants without harming tall fescue and research conducted in Tennesssee reported partial control with bromoxynil at normal labeled rates. Better selective controls are needed. Our goal was to evaluate carfentrazone and bromoxynil in various combinations with dicamba to improve selective star-of-Bethlehem control. Experiments were conducted in April 2005 in Nelson County, VA to evaluate combinations and rates of dicamba, bromoxynil, and carfentrazone. Dicamba was applied at 2.2 or 4.4 kg ae/ha, bromoxynil at 0.56 or 1.12 kg ai/ha, and carfentrazone at 0.03 or 0.06 kg ai/ha. Various combinations, such as dicamba followed by bromoxynil, were also evaluated. Plots were visually rated for effects on tall fescue turf and star-of-Bethlehem one month later and plots have been marked for evaluation next year. Our comparison treatments included paraquat applied twice at 1.3 kg ae/ha and a nontreated control. As in previous years, paraquat controlled star-of-Bethlehem 96% but also injured tall fescue 95%. Treating with dicamba one week before treating with bromoxynil did increase the level of star-of-Bethlehem control by 20% compared to either a single treatment of dicamba or bromoxynil but the best control observed with a combination of the two was 63% at one month after initial treatment. An unexpected result of this research was that carfentrazone at 4 fluid ounces per acre controlled star-of-Bethlehem 96% one month after treatment. Combinations of dicamba followed one week later with two treatments of carfentrazone, each at 2 fluid ounces per acre, also controlled the weed 96%. Carfentrazone, dicamba, and bromoxynil did not injure tall fescue." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Askew, S. D., and J. B. Willis. 2006. Carfentrazone for selective star-of-Bethlemhem control. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 60:p. 95. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2006.pdf#page=100
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 60 |
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