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| Publication Type:
| Report |
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| Author(s): | Baird, James H.;
Calhoun, Ronald N. |
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| Author Affiliation: | Baird: Assistant Professor; Calhoun: Research Assistant, Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan |
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| Title: | Postemergence control of slender speedwell in Kentucky bluegrass turf |
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| Section: | Industrial, forestry, turf, and aquatic
Other records with the "Industrial, forestry, turf, and aquatic" Section
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| Meeting Info.: | Louisville, Kentucky: December 9-11, 1997 |
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| Source: | Proceedings: North Central Weed Science Society. Vol. 52, 1997, p. 107. |
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| Publishing Information: | [Champaign, Illinois]: [North Central Weed Science Society] |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Slender speedwell is a troublesome weed of turf in the northern U.S. An experiment was conducted in July 1997 in East Lansing, MI to compare sulfentrazone, carfentrazone-ethyl, dithiopyr, and quinclorac in combinations with commonly-used postemergence broadleaf herbicides for selective control of slender speedwell in Kentucky bluegrass turf. The turf was mowed at 6.4 cm on a Marlette sandy loam. Herbicides were applied in 524 L ha-1 of water using a CO2-powered ground sprayer. Treatments were arranged in a randomized complete block design with three replications. Herbicides and rates (kg ai ha-1) applied were: 1) 2,4-D (0.29, 0.58) + mecoprop (0.29, 0.58) + sulfentrazone (0.02, 0.04); 2) MCPA (0.46, 0.92) + dicamba (0.06, 0.12) + carfentrazone-ethyl (0.01, 0.02); 3) 2,4-D (0.29, 0.58) + dicamba (0.06, 0.12) + carfentrazone-ethyl (0.01, 0.02); 4) 2,4-D (0.58, 0.84) + mecoprop (0.45, 0.61) + dicamba (0.09, 0.12); 5) 2,4-D (1.1) + mecoprop (0.61) + dicamba (0.12) + dithiopyr (0.56); and 6) 2,4-D (1.1) + mecoprop (0.61) + dicamba (0.12) + quinclorac (0.84). Forty-two days after treatment, percent slender speedwell control for the above treatments was: 1) 63, 85; 2) 66, 54; 3) 45, 66; 4) 61, 88; 5) 97; and 6) 100. No turf injury was observed throughout the experiment. Tank mixes containing 2,4-D, mecoprop, and dicamba were more effective on slender speedwell compared to tank mixes containing sulfentrazone or carfentrazone-ethyl. Sulfentrazone tank mixes provided more effective control of slender speedwell than carfentrazone-ethyl tank mixes. These results support previous research regarding the efficacy of quinclorac on slender speedwell." |
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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):
Baird, J. H., and R. N. Calhoun. 1997. Postemergence control of slender speedwell in Kentucky bluegrass turf. Proc. North Cent. Weed Sci. Soc. 52:p. 107. |
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