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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=307
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Medlin, C. R.;
Woods, R. L.;
Jones, M. R. |
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| Author Affiliation: | Oklahoma State University and Oklahoma State University Cooperative Extension Service, Stillwater, OK |
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| Title: | Bermudagrass tolerance to herbicides for controlling grassy weeds in pastures |
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| Section: | Symposia - grassy weed control in pastures
Other records with the "Symposia - grassy weed control in pastures" Section
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| Meeting Info.: | San Antonio, Texas: January 23-25, 2006 |
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| Source: | Proceedings: Southern Weed Science Society 59th Annual Meeting. Vol. 59, 2006, p. 235. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cynodon dactylon; Herbicide efficacy; Herbicide evaluation; Herbicide resistance; Pastures; Weed control
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| Abstract/Contents: | ""Bermudagrass (Cynodon dactylon) is a common forage crop used across the Southeast United States. This crop is a warm-season, sod-forming grass which spreads mainly by rhizomes and stolons, and does not grow much taller than 70 cm. Summer grass weeds, such as johnsongrass (Sorghum halepense), foxtail (Setaria spp.), and field sandbur (Cenchrus incertus) are common problems in bermudagrass pastures. Imazapic was once registered for control of many grassy weeds in bermudagrass, however, after only a few years on the market the label was changed making it illegal to use the product on bermudagrass. Experimental herbicide treatments currently being investigated for this part niche also exhibit significant visual (qualitative) crop response, however, documented quantitative yield response from these experimental treatments have not been documented. Therefore, the objective of this research was to evaluate bermudagrass growth response to various combinations of terbacil (1.2 lb ai/A) or diuron (0.8 lb ai/A) applied alone as a preemergence (PRE) treatment, or applied postemergence (POST) in combination with nicosulfuron (0.04, 0.05, or 0.06 lb ai/A), and glyphosate+imazapic (0.04+0.07 or 0.05+0.09). Traditional small-plot, RCB design, weed-free field experiments with four replications were utilized. On common bermudagrass (i.e. variety unknown) glyphosate+imazapic applied POST resulted in the most bermudagrass stunting (80 to 83%) by 4 WAT, followed by nicosulfuron (50 to 60%). Tankmixing diruon (0.8 lb/A) with nicosulfuron (0.05 lb/A) decreased bermudagrass stunting from 55% to 16%. Dry matter yield from these treatments averaged from 2530 to 2642 lbs/A in the glyphosate+imazapic treated plots, from 4264 to 5580 lb/A in the nicosulfuron treated plots, 7588 lb/A in the nicosulfuron+diuron treated plots, and 6106 in the untreated check. When applied to Midland 99 bermudagrass visual injury was not as apparent. Similarly, yield from Midland 99 was not reduced as much as common bermudagrass. Midland 99 yields averaged from 6505 to 7594 lb/A in the glyphosate+imazapic treated plots, from 6376 to 8124 lb/A in the nicosulfuron treated plots, 9035 lb/A in the nicosulfuron+diuron treated plots, and 7831 lb/A in the untreated check. Further investigations should be conducted to determine if the yield increase from nicosulfuron+diuron is consistent across years, environments, and bermudagrass cultivars." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Vision for the future"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Medlin, C. R., R. L. Woods, and M. R. Jones. 2006. Bermudagrass tolerance to herbicides for controlling grassy weeds in pastures. South. Weed Sci. Soc. Proc. 59:p. 235. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=307
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b2207931 |
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