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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Taylor, J. M.;
Coats, G. E. |
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| Author Affiliation: | Mississippi State University |
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| Title: | Evaluations of postemergence herbicides for grass weed control in bermudagrass rights-of-way |
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| Meeting Info.: | Charlotte, NC: January 18-20, 1993 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 46, 1993, p. 374. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Postemergence herbicides; Cynodon dactylon; Roadside turf; Weed control; Setaria; Andropogon gerardii; Andropogon virginicus; Festuca arundinacea
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| Abstract/Contents: | "Experiments were initiated in 1992 to evaluate POST control of grass weeds in bermudagrass roadside turf. In addition to being unsightly, weeds may reduce sight distance to contribute to other safety hazards. Species evaluated were knotroot foxtail [Setaria geniculata (Lam.) Beauv.], silver beardgrass (Andropogon saccharoides Swartz.), tall fescue (Festuca arundinacea Schreb.) and broomsedge (Andropogon virginicus L.). Accent (nicosulfuron) at 0.5 to 2.0 oz pr/A, 43 to 86 oz pr/A Daconate 6 (MSMA), 8 to 16 oz pr/A Roundup (glyphosate), 7 to 9 oz pr/A horizon 2000 (fluazifop-P + fenoxaprop-P), 20 oz/A Assure (quizalofop), were applied to silver beardgrass on June 17th. The same treatments, as well as 1 + 8 or 2 + 8 oz pr/A Cadre (AC 263,222) + Event (imazethapyr + imazapyr), were applied to knotroot foxtail and broomsedge on June 22. Knotroot foxtail was 4 in tall and broomsedge was 6 in tall. Silver beardgrass was 12 in tall. Environmental conditions during the evaluation period favored actively growing weeds. By 8 WAT, 16 oz/A Roundup resulted in the best control of knotroot foxtail at 68%. Roundup at 12 oz/A alone or tank mixed with Accent provided similar control. The best control of broomsedge at 4 and 8 WAT was with > or = 43 oz/A MSMA, which was greater than all other treatments. Roundup at 16 oz/A resulted in better control of silver beardgrass than other treatments at 2, 5, and 9 WAT (45, 65, and 68% as compared to < or = 35, 50, and 48%, respectively). In a third experiment, 8 to 16 oz/A Roundup, 8 or 9 oz/A Horizon 2000, 64 or 86 oz/A MSMA, or 2 + 8 oz/A Cadre + Event were applied to a bermudagrass roadside turf infested with knotroot foxtail and semi-dormant tall fescue. Injury to bermudagrass was 40 to 43% with Horizon 2000 and 16 oz/A Roundup was 23, 30, and 18%, respectively. The best control of knotroot foxtail throughout the duration of the experiment was noted with 16 oz/A Roundup which was 83% from 4 to 8 WAT. Spraying 86 oz/A MSMA or 12 oz/A Roundup resulted in comparable control at these dates. When tall fescue growth resumed at 8 WAT, a rate response was noted between Roundup treatments with 16 oz/A resulting in 78% control." |
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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):
Taylor, J. M., and G. E. Coats. 1993. Evaluations of postemergence herbicides for grass weed control in bermudagrass rights-of-way. South. Weed Sci. Soc. Proc. 46:p. 374. |
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MSU catalog number: SB 611 .S6 v.46 |
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