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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Boyd, J. W.;
Rodgers, B. N. |
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| Author Affiliation: | University of Arkansas, Little Rock, AR 72204 |
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| Title: | Tufted lovegrass control in Meyer Zoysiagrass |
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| Section: | Weed management in turf, pastures and rangeland
Other records with the "Weed management in turf, pastures and rangeland" 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. 75. |
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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: Eragrostis pectinacea; Zoysia japonica; MSMA; Resistance; Weed control; Herbicide evaluation; Herbicide injury; Tank mix; Preemergence weed control; Postemergence weed control; Fluazifop-butyl; Sethoxydim; Clethodim; Nicosulfuron; Primisulfuron; Atrazine; Quinclorac; Asulam; Pronamide; Application rates; Oxadiazon; Simazine; Metolachlor; Glyphosate
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| Cultivar Names: | Meyer |
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| Abstract/Contents: | "Tufted lovegrass (Eragrostis pectinacea) is a summer annual that blooms from July to October. It is a problem weed in `Meyer' zoysiagrass (Zoysiajaponica `Meyer') sod production in Arkansas, western Tennessee and northern Mississippi. MSMA tolerance is the primary reason for the success of tufted lovegrass as a weedy invader. Another contributing factor is the relatively slow re-growth of zoysiagrass after sod harvest. The soil surface in a harvested field is bare for several months creating an ideal environment for the establishment of a competitive stand of this weed. Two studies were conducted at Winrock sod farm in central Arkansas during 1997 and 1998 to evaluate several herbicides for preemergence and postemergence conrol of tufted lovegrass. Both sites are located on silt loam soil that has been in zoysiagrass production for more than 20 years. In 1997, postemergence herbicides were applied to a blooming, well-established stand of lovegrass on August 6. Fluazifop-butyl, sethoxydim, clethodim, nicosulfuron, primisulfuron, atrazine, quinclorac, asulox and pronamide were ineffective for lovegrass control. At 29 days after treatment (DAT), fenoxaprop at 0.25 lb ai/a and glyphosate at 0.38 lb ai/a, glyphosate controlled 70% control. AT 29 days after treatment (DAT), fenoxaprop at 0.25 lb ai/a and glyphosate at 0.38 lb ai/a, glyphosate controlled 70% control of the lovegrass and caused 30% zoysiagrass injury. On the same evaluation date, glyphosate at 0.5 lb ai/a and glufosinate at 0.75 lb ai/a controlled 100% of the lovegrass and resulted in 60% zoysiagrass injury. On April 30, 1998 and injury ratings for glufosinate and the higher rate of glyphosate were 40 and 80%, respectively. Atrazine, applied preemergence on April 2, 1998, at 1.5 lb ai/a and followed by the same rate on May 18 provided>95% control of lovegrass at 138 DAT. Two applications of oxadiazon at 2.0 lb ai/a (April 2 and June 16) resulted in 65% lovegrass control at 138 DAT. Treatments consisting of two applications of simazine at 1.5 lb ai/a (April 2 and May 18) or two applications of metolachlor at 1.0 lb ai/a (April 2 and June 16) were ineffective for lovegrass control. Two applications (April 2 and June 16) of simazine + oxadiazon, atrazine + oxadiazon and atrazine + metolachlor at the previously listed rates provided >95% lovegrass control at 138 DAT. Simazine + metolachlor controlled 60% of the lovegrass at 138 DAT. Glyphosate, applied July 7, 1998, at 0.19, 0.25 and 0.31 lb ai/a provided 0,47 and 100% control of lovegrass at 40 DAT. Glyphosate at 0.031 lb ai/ac produced 10% zoysiagrass injury at 40 DAT. No injury was evident for the lower rates of glyphosate at 40 DAT." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: M S M A |
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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):
Boyd, J. W., and B. N. Rodgers. 1999. Tufted lovegrass control in Meyer Zoysiagrass. South. Weed Sci. Soc. Proc. 52:p. 75. |
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MSU catalog number: SB 611 .S6 v.52 |
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