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| Publication Type:
| Report |
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| Author(s): | Samples, T. J.;
Cargill, L. M.;
Brede, A. D.;
Montgomery, D. P. |
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| Author Affiliation: | Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, Oklahoma |
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| Title: | Johnsongrass control and bermudagrass phytotoxicity of herbicides |
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| Section: | The control of weeds and woody plants on utility, railroad and highway rights-of-way, and on industrial sites
Other records with the "The control of weeds and woody plants on utility, railroad and highway rights-of-way, and on industrial sites" Section
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| Meeting Info.: | Hot Springs, Arkansas: January 17-19, 1984 |
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| Source: | Proceedings: Southern Weed Science Society 37th Annual Meeting. Vol. 37, 1984, p. 277. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Johnsongrass (Sorghum halepense (L.) Pers.), a widely distributed, perennial grass, has become a major weed problem along Oklahoma rights-of-way. Field investigations were conducted at 2 locations to determine the effectiveness of 7 pre- and postemergence herbicides for johnsongrass control. Duplicate herbicide treatments were applied at each location to evaluate phytoactivity on common bermudagrass (Cynodon dactylon (L.) Pers.), a prominant [prominent] species existing adjacent to the roadside. A randomized complete block field design was employed with 3 replications per investigation at each location. Herbicides were applied using a hand-held, 3-nozzle CO2 sprayer calibrated to deliver 374 litre/ha solution through SS 8001.5 spray tips at 2.4 km/hr and 1.4 x 105 pascals. Herbicide effectiveness was determined by visual ratings of johnsongrass control reported on a 10 to 100 scale with 100 indicating complete, and 10, no control. Herbicide phytoactivity evaluation by occular examination of common bermudagrass shoots was based on a 10 to 100 scale with 10 representing no herbicidal effect and 100, total discoloration. No significant differences (0.01) in johnsongrass control occurred among postemergence applications of Oustā¢ [methyl 2-((((( 4,6 dimethyl-2-pyrimidinyl)amino)-carbonyl)amino)sulfonyl) benzoate] at 0.26 kg ai/ha and 0.32 kg ai/ha, 2 postemergence applications of SC-0224 (Stauffer experimental) at 1.79 kg ai/ha and glyphosate [N-(phosphomethyl)glycine] at 1.68 kg ai/ha, and 3 postemergence applications of MSMA at 3.36 kg ai/ha approximately 4.5 months following the initial applications. Preemergence applications of oryzalin [3,5-dinitro-N4,N4dipropylsulfanilamide] at 4.48 kg ai/ha and metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1 -methylethyl)acetamide] at 2.8 kg ai/ha prior to 3 postemergence applications of MSMA at 3.36 kg ai/ha did not enhance johnsongrass control. Repeated applications of glyphosate at 1.12 kg ai/ha and 1.68 kg ai/ha, and SC-0224 at 1.79 kg ai/ha exhibited significant (0.01) phytoactivity on common bermudagrass. A significant herbicide x location interaction was observed on 3 occasions." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Biotechnology & Weed Science"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Samples, T. J., L. M. Cargill, A. D. Brede, and D. P. Montgomery. 1984. Johnsongrass control and bermudagrass phytotoxicity of herbicides. South. Weed Sci. Soc. Proc. 37:p. 277. |
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