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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=541
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Montgomery, D.;
Evans, C.;
Martin, D. |
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| Author Affiliation: | Horticulture & Landscape Architecture, Oklahoma State University, Stillwater, OK |
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| Title: | Control of kochia with DPX-KJM44 along Oklahoma highway rights-of-way |
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| Section: | Horticultural crops
Other records with the "Horticultural crops" Section
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| Meeting Info.: | Orlando, Florida: February 9-12, 2009 |
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| Source: | 2009 Proceedings, Southern Weed Science Society. Vol. 62, 2009, p. 471. |
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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 evaluation; Bassia; Postemergence weed control
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| Trade Names: | DPX-KJM44 |
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| Abstract/Contents: | "A research study was conducted during 2008 to evaluate the effectiveness of several herbicide treatments for selective postemergence control of kochia. Treatments were applied on 29 May to 1-10 inch tall kochia, 1-4 leaf stage large crabgrass, and common bermudagrass at 100% green-up. Treatments were applied using a CO2 pressurized sprayer calibrated to deliver 20 gallons of water/A and were arranged in a randomized complete block design with three replications. Treatments evaluated included DPX-KJM44 at 0.25, 0.5, 1.0, and 2.0 oz. a.i./A alone, and combined with Telar at 0.375 oz. a.i./A, DPX-MAT28 at 0.25, 0.5, and 1.0 oz. a.i./A, Telar alone at 0.375 oz. a.i./A, and Milestone VM at 0.75, 1.0, and 1.75 oz. a.i./A. All treatments included a methylated seed oil at 1.0% V/V. Plots were visually evaluated at 32, 62, and 91 days-after-application (DAA) for percent weed control and percent common bermudagrass injury as compared to untreated plots. This study was conducted under ideal growing conditions including moderate temperatures and good rainfall throughout the duration of the study. At 32 days-after-application DPX-KJM44 at 0.5, 1.0 and 2.0 oz. a.i./A, DPX-KJM44 at 1.0 and 2.0 oz. a.i./A tank-mixed with Telar, and DPX-MAT28 at 1.0 oz. a.i./A were all producing good to excellent control of kochia (85-99%). At this time lower rates of KPX-KJM44 tank-mixed with Telar and lower rates of DPX-MAT28 were providing moderate kochia control (65-73%). All other treatments were providing poor control of kochia at 32 DAA. At 62 DAA kochia control increased for all DPX-KJM44 and DPX-MAT28 treatments. All treatments of DPX-KJM44 and DPX-MAT28 at 0.5 and 1.0 oz. a.i./A were producing excellent kochia control (91-100%). There was a small DPX-KJM44 rate response at that time but kochia was very susceptible to even the lowest rates evaluated. The lowest rate of DPX-MAT28 was providing moderate kochia control (78%) at 62 DAA. All other treatments were providing poor kochia control at 62 DAA. Kochia control at 91 DAA was very similar to that produced at 62 DAA. All of the treatments that were producing excellent kochia control at 62 DAA were maintaining this high level of control into late summer. This was a very positive result as this research site received several good rainfall events in midsummer which typically would promote kochia germination. The DPX-KJM44 and MAT28 products were producing good postemergence control of existing kochia and preventing later kochia from emerging. The Telar and Milestone VM treatments in this study produced poor kochia control throughout the duration of the study. At 32 DAA DPX-KJM44 at 2.0 oz. a.i./A alone, or when tank-mixed with Telar was producing good to excellent control of large crabgrass (85-95%). At that time DPX-MAT28 at 1.0 oz. a.i./A was producing moderate control of large crabgrass (75%). By 62 DAA control of large crabgrass had decreased for all treatments. Treatments containing DPX-KJM44 at 2.0 oz. a.i./A alone, or combined with Telar were maintaining moderate levels of control (65-73%). AT 91 DAA all treatments were producing poor large crabgrass control. Common bermudagrass injury was evaluated throughout the duration of this study. At 32 DAA a small amount of common bermudagrass phytotoxicity was noticed with DPX-KJM44 at 2.0 oz.a.i./A alone, or tank-mixed with Telar (3-7%). This amount of bermudagrass toxicity was more than acceptable and was not evident at 62 and 91 DAA.The authors would like to express their appreciation to the Oklahoma Department of Transportation and DuPont for their support of this research effort." |
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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):
Montgomery, D., C. Evans, and D. Martin. 2009. Control of kochia with DPX-KJM44 along Oklahoma highway rights-of-way. South. Weed Sci. Soc. Proc. 62:p. 471. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=541
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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