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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Taylor, J. M.;
Coats, G. E.;
Arnold, J. C.;
Hutto, K. C. |
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| Author Affiliation: | Mississippi State University, Mississippi State, MS |
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| Title: | Broadleaf weed control in bermudagrass turf |
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| Section: | Section II: Weed management in turf, pasture, and rangeland
Other records with the "Section II: Weed management in turf, pasture, and rangeland" Section
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| Meeting Info.: | 54th Annual Meeting, Biloxi, Mississippi: January 22-24, 2001 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 54, 2001, p. 67-68. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Broadleaf weed control; Cynodon dactylon; Clopyralid; Fluroxypyr; Synergism; Dicamba; Quinclorac; Application rates; Plantago lanceolata; Geranium carolinianum; Sherardia arvensis; Diodia virginiana; Herbicide combinations
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| Abstract/Contents: | "Studies were conducted at the Plant Science Research Center at Mississippi State University to evaluate the pyridine herbicides, clopyralid and fluroxypyr, and the effect of the synergist diflufenzopyr on dicamba and quinclorac for broadleaf weed control in dormant bermudagrass turf. In the first two experiments, the treatments were 0.25 lb ae/A clopyralid, 0.28 lb ae/A fluroxypyr, 0.25 + 0.28 lb/A clopyralid + fluroxypyr, 0.12 followed by (fb) 0.12 lb/A clopyralid 30 days after initial treatment (DAIT), 0.14 fb 0.14 lb/A fluroxypyr 30 DAIT, and 0.12 + 0.14 lb/A clopyralid + fluroxypyr fb 0.12 + 0.14 lb/A clopyralid + fluroxypyr 30 DAIT. These treatments were compared to a standard treatment of 0.76 + 0.4 + 0.08 lb ae/A 2,4-D + MCPP + dicamba. In the first experiment the treatments were applied in a spray volume of 40 gallons per acre (GPA) to dormant bermudagrass infested with buckhorn plantain (15 to 20-lf), Carolina geranium (8-lf), and field madder (8-node) on March 2, 2000. The single application of clopyralid controlled buckhorn plantain 83% at 28 or 67 DAIT. This was higher than the split application of clopyralid (63 to 75%) or the single or split applications of fluroxypyr (20% or less) and was equal to a single application of clopyralid (63 + fluroxypyr or 2,4-D + MCPP + dicamba (76 to 88%). Fluroxypyr as a single or split application controlled Carolina geranium 18% or less at 28 or 67 DAIT. The highest control of Carolina geranium at 67 DAIT was with the split application of clopyralid + fluroxypyr (88%) or 2,4-D + MCPP + dicamba (87%). Comparable Carolina geranium control was observed with fluroxypyr + clopyralid (74%) or clopyralid (68%). All treatments controlled common vetch 90% at 28 or 67 DAIT. Field madder control was 78 to 81% with any treatment containing fluroxypyr compared to 60% or less with other treatments. The greatest increase in bermudagrass density observed at 112 DAIT was following the single application of clopyralid + fluroxypyr. The average density of this treatment was 70% compared to 23% for the untreated. Fluroxypyr applied alone as a single or split application did not increase bermudagrass density compared to the untreated. These same treatments were applied to Virginia buttonweed with treatments being initiated on July 17, 2000. The approximate coverage of Virginia buttonweed was 50 to 70% and plants were flowering. The best control of Virginia buttonweed at 42 DAIT were the single or split application combinations of clopyralid + fluroxypyr (83 to 90%) compared to 60% control with 2,4-D + MCPP + dicamba. In a third experiment, 0.05 lb ai/A diflufenzopyr was tank-mixed with 0.3 lb ae/A dicamba or 0.75 lb ai/A quiclorac. The application date and weed stage at treatment were the same as the first experiment. With the exception of Carolina geranium control at 67 days after treatment (DAT), where control with quinclorac was equal to the combination of quinclorac + diflufenzopyr, synergy was observed with combinations of diflufenzopyr plus either dicamba or quinclorac. Synergism was calculated using Colby's formula plus the calculated LSD. At 28 DAT, diflufenzopyr + dicamba or quinclorac controlled of buckhorn plantain 74 to 88% compared to 20% or less with any of these products alone. Carolina geranium control at 28 DAT was 75 to 80% with the combinations compared to 35% or less with the products applied alone. Field madder control was 70 to 80% with the tank-mixes compared to 45% or less with the products applied alone." |
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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):
Taylor, J. M., G. E. Coats, J. C. Arnold, and K. C. Hutto. 2001. Broadleaf weed control in bermudagrass turf. South. Weed Sci. Soc. Proc. 54:p. 67-68. |
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