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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Cargill, L. M.;
Martin, D. L.;
Montgomery, D. P.;
Jamison, J. D. |
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| Author Affiliation: | Department of Horticulture and Landscape Architectrue, Oklahoma State University, Stillwater, OK 74078 |
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| Title: | Evaluation of fluroxypyr for control of kochia (Kochia scoparia L.) on bermudagrass roadsides in Oklahoma |
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| Section: | Vegetation management in utility, railroad and highway right-of-ways, and on industrial sites
Other records with the "Vegetation management in utility, railroad and highway right-of-ways, and on industrial sites" Section
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| Meeting Info.: | 52nd Annual Meeting, Greensboro, NC, January 25-27, 1999 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 52, 1999, p. 149. |
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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: Convolvulus arvensis; Weed control; Roadside turf; Roadsides; Imazameth; Herbicide evaluation; Application rates; Application timing; 2,4-D; Cynodon dactylon; Imidazolinone herbicides; Herbicide injury; Fluroxypyr
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| Geographic Terms: | Oklahoma |
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| Abstract/Contents: | "A field study was initiated in June 1998 to evaluate the efficacy of fluroxypyr and Vanquish for control of kochia and herbicide tolerance of common bermudagrass. Herbicide treatments evaluated included fluroxypyr at 0.14, 0.21, 0.28 and 0.56 kg ai/ha⁻¹. Two comparative standard treatments evaluated included Vanquish at 0.28 and 0.56 kg ai/ha⁻¹. All herbicide treatments included a non-ionic surfactant at a rate of 0.25% v/v. Treatments were applied to 13-36 cm tall kochia plants in plots 1.5 by 3.0 meters. Applications were made with CO₂ pressurized R & D brand boom-type bicycle sprayer equipped with three TeeJet 8002 VS flat-fan spray tips and calibrated to deliver 187 1 ha⁻¹ at a pressure of 172 kPa. Treatments were arranged in a randomized complete block design with three replications. Visual observations were made at 14, 30 and 60 days-after-treatment (DAT) for percent kochia control and common bermudagrass injury as compared to the untreated check plots. No common bermudagrass injury was observed from any herbicide treatment at 14 DAT. However, when evaluations were conducted at 30 DAT, all herbicide treatments were producing 3.3% to 8.3% injury. By 60 DAT, no injury was present (O%) and the bermudagrass had fully recovered. All common bermudagrass injury visually observed in this experiment was acceptable for Oklahoma roadside situations. Acceptable bermudagrass injury along Oklahoma roadsides from any herbicide treatment should not exceed 40% to 50% and not persist for longer than 4 to 6 weeks. For acceptable kochia control, herbicide treatments should provide a minimum of 90% control for roadside situations in Oklahoma. Percent kochia control from all herbicide treatments was unacceptable (37% to 60%) when evaluations were made at 14 DAT. By 30 DAT, the highest rate of both fluroxypyr and Vanquish (0.56 kg ai/ha⁻¹) were producing significantly better control (although marginal) of kochia (75% to 85%) than the remaining treatments (35% to 47%). When evaluations were conducted at 60 DAT, all herbicide treatments were producing marginal to an acceptable level of kochia control (84% to 97%). The two higher rates of fluroxypyr at 0.28 and 0.56 kg ai/ha⁻¹ were equally effective (93% to 97%) as compared to the two equivalent rates of the standard treatments of Vanquish at 0.28 and 0.56 kg ai/ha⁻¹ (94% to 97%) and provided acceptable kochia control. The two lowest rates of fluroxypyr (0.14 and 0.21 kg ai/ha⁻¹) produced only marginal kochia control (84% to 88%)." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: 2, 4 - D in Turf |
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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):
Cargill, L. M., D. L. Martin, D. P. Montgomery, and J. D. Jamison. 1999. Evaluation of fluroxypyr for control of kochia (Kochia scoparia L.) on bermudagrass roadsides in Oklahoma. South. Weed Sci. Soc. Proc. 52:p. 149. |
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