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| Publication Type:
| Refereed |
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| Author(s): | Butler, J. Hugh B.;
Appleby, Arnold P. |
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| Author Affiliation: | Oregon State University |
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| Title: | Tolerance of red fescue (Festuca rubra) and bentgrass (Agrostis spp.) to sethoxydim |
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| Source: | Weed Science. Vol. 34, No. 3, May 1986, p. 457-461. |
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| Publishing Information: | Champaign, IL: Weed Science Society of America |
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| Keywords: | TIC Keywords: Festuca rubra subsp. rubra; Agrostis; Sethoxydim; Resistance; Poa annua; Festuca arundinacea; Bromus tectorum; Lolium multiflorum; Herbicide selectivity
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| Abstract/Contents: | "Sethoxydim is used to control weedy grasses in red fescue (Festuca rubra and Festuca rubra ssp. commutata), an important seed crop in Oregon. The sethoxydim rate required to reduce growth rate of 11 cultivars of red fescue and four cultivars of bentgrass (AGrostis tenuis and A. stolonifera L. var. palustris), a common contaminant in red fescue fields, by 50% (GR50) was determined in a greenhouse and laboratory experiments. Field experiments compared only red fescue cv. 'Pennlawn' and bentgrass cv. 'Penncross'. The GR50 values for Pennlawn red fescue in the field, the greenhouse, and the laboratory were 30 kg ai/ha, 15 kg/ha, and 5300 uM, respectively. Penncross bentgrass was approximately 400, 1400, and 12900 times more susceptible than Pennlawn red fescue in the field, in the greenhouse, and in the laboratory experiments, respectively. Plants were at different growth stages in the different experiments. The xylene and surfactant used as a solvent for the technical grade sethoxydim was as toxic to red fescue without sethoxydim was as toxic to red fescue without sethoxydim as when sethoxydim was included. Cultivars of red fescue differed in their response to sethoxydim, but cultivars of bentgrass did not. The GR50's of other species tested in the greenhouse were >4 kg/ha for annual bluegrass (Poa annua L.), 0.22 kg.ha for tall fescue (F. arundinacea Schreb.), 0.37 kg/ha for downy brome (Bromus tectorum L.), and 0.017 kg/ha for Italian ryegrass (Lolium multiflorum Lam.)." |
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| Language: | English |
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| References: | 13 |
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| Note: | Tables
Figures |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Butler, J. H. B., and A. P. Appleby. 1986. Tolerance of red fescue (Festuca rubra) and bentgrass (Agrostis spp.) to sethoxydim. Weed Sci. 34(3):p. 457-461. |
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MSU catalog number: SB 610 .W38 |
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