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| Publication Type:
| Report |
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| Author(s): | Miller, J. F.;
Middlebrooks, P. D.;
Gonzalez, F. E. |
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| Author Affiliation: | Miller: Georgia Extension Service; Middlebrooks: Georgia Department of Transportation; Gonzalez: E. I. DuPont de Nemours |
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| Title: | Suppression of perennial grasses in bermudagrass on roadsides |
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| Section: | The control of weeds and woody plants on utility, railroad and highway rights-of-ways, and on industrial sites
Other records with the "The control of weeds and woody plants on utility, railroad and highway rights-of-ways, and on industrial sites" Section
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| Meeting Info.: | Biloxi, Mississippi: January 18-20, 1983 |
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| Source: | Proceedings: Southern Weed Science Society 36th Annual Meeting. Vol. 36, 1983, p. 317-318. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 2 |
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| Abstract/Contents: | "Small plot trials were established at Unadilla and Braselton, Georgia in 1982 to compare efficacy of several old and new herbicides or herbicide and rate combinations. The same plot layout was utilized in both sites, but with different dates for application and for rating vegetation suppression. Treatments were DPX-T6376-21 (70%DF) at 0.5, 1.0 and 2.0 ounces active ingredient per acre alone and in combination with chlorsulfuron (Glean 75%DF) at 0.06 and 0.12 oz. per acre or methyl 2 [[[[(4,6-dimethyl-2-pyrimidinyl)amino]-carbonyl]amino] sulfonyl]benzoate (Oust 75%DF) at 0.06 and 0.12 oz. per acre or maleic hydrazide at 4 lbs. ai/A. plus dicamba at 1.0 lb. ai./A.; chlorsulfuron (Glean) at 0.06, 0.12, 0.25, 0.5, 1.0 and 2.0 oz./A.; DPX6206 (71%) at 0.5, 1.0 and 2.0 oz./A.; MSMA at 2.0 lbs. ai/A.; and EPTC (5% and 10% granules) at 4.0 and 6.0 lbs. ai/A. Plot size was 500 sqft. (10ft. X 50ft.), replicated three times at two locations. Spray volume was 40 gallons per acre. Surfactant was applied with all spray treatments. Vegetative cover at Braselton was comprise of tall fescue (Festuca elatior) and common bermudagrass (Cynodon dactylon), with scattered patches of Sericea lespedeza. Other species of Lespedeza also occurred in the area. At Unadilla, the cover was primarily bahiagrass (Paspalum notatum) and centipedegrass (Eremochloa ophiurodes) with some common and Coastal bermudagrass and wild vetch (Vicia sp.). Plots at Braselton were sprayed at 30 March 82 and rates on 21 May and 5 August. Plots at Unadilla were treated on 13 May 82 and rated on 16 July and 17 August 82. Only the first rating date for each location was valid due to extreme drought in mid-summer at Braselton and an unscheduled mowing of plots at Unadilla on 26 July 82. All herbicide treatments generally gave a higher degree of control at Unadilla than at Braselton, except EPTC. EPTC gave 80 to 90% control of fescue seedheads and growth, but provided no control of bahiagrass. Oust at higher rates suppressed bahiagrass at the 80 to 90% level, but was less effective on fescue by 4 to 20%. DPX-T6376-21 was more effective than Oust against bahiagrass but was less effective than Oust against fescue. The combination of DPX-T6376-21 at 1 oz. plus Oust at 0.12 oz./A. was very effective against bahiagrass but gave poor suppression of fescue. DPX6206 gave excellent control of bahiagrass and good control of fescue. Bermudagrass was not significantly injured by any herbicide treatment at Unadilla or Braselton. Centipedegrass exhibited excellent tolerance to Oust, DPX-T6376-21 and DPX6206. Chlrosulfuron (Glean) had essentially no effect on bahiagrass and provided only mediocre suppression of fescue. A second set of Oust treatments were established at Jesup on 1 July 82 to establish bahiagrass control in centipedegrass more clearly, in the same rate range outlined earlier. Centipedegrass was tolerant at all rates. Average bahiagrass control values from three replications from low rate to high rate were 10, 20, 40, 60, 80 and 90% control when rated on 29 July 82. A third trial with three replicates was established in Macon County on 20 July 82 to determine the effect of several herbicides on johnsongrass and bahiagrass control. Plots were rated on 16 August 82. Oust controlled johnsongrass better than bahiagrass. Bahiagrass control with Oust at 1.0 oz./A. was equal to MSMA at 2.0 and 4.0 lbs./A. and to Roundup at 0.25 and 2.0 lbs./A. Sethoxydim (Poast) gave excellent control of both johnsongrass and bahiagrass." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Room for growth: Our responsibility"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Miller, J. F., P. D. Middlebrooks, and F. E. Gonzalez. 1983. Suppression of perennial grasses in bermudagrass on roadsides. South. Weed Sci. Soc. Proc. 36:p. 317-318. |
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