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DOI: | 10.1614/WT-06-168.1 |
Web URL(s): | http://www.bioone.org/doi/full/10.1614/WT-06-168.1 Last checked: 02/29/2012 Access conditions: Item is within a limited access website http://www.bioone.org/doi/pdf/10.1614/WT-06-168.1 Last checked: 02/29/2012 Requires: PDF Reader Access conditions: Item is within a limited access website |
Publication Type:
| Refereed |
Author(s): | Nandula, Vijay K.;
Poston, Daniel H.;
Eubank, Thomas W.;
Koger, Clifford H.;
Reddy, Krishna N. |
Author Affiliation: | Nandula: Postdoctoral Research Associate; Poston: Associate Research and Extension Professor; Eubank: Research Associate, Delta Research and Extension Center, Mississippi State University; Koger: Research Agronomist, USDA-ARS Crop Genetics and Production Research Unit; Reddy: Research Plant Physiologist, USDA-ARS Southern Weed Science Research Unit, Stoneville, MS |
Title: | Differential response to glyphosate in Italian ryegrass (Lolium multiflorum) populations from Mississippi |
Source: | Weed Technology. Vol. 21, No. 2, April-June 2007, p. 477-482. |
Publishing Information: | Champaign, IL: Weed Science Society of America. |
# of Pages: | 6 |
Related Web URL: | http://www.bioone.org/doi/abs/10.1614/WT-06-168.1 Last checked: 03/08/2012 Notes: Abstract only |
Keywords: | TIC Keywords: Clethodim; Comparisons; Diclofop; Glyphosate; Growth analysis; Herbicide evaluation; Herbicide rates; Herbicide resistance; Lolium multiflorum; Mechanism of resistance; Weed resistance
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Cultivar Names: | Elizabeth; Tribbett; Fratesi |
Geographic Terms: | Mississippi, United States |
Abstract/Contents: | "Two Italian ryegrass populations from Mississippi, Tribbett and Fratesi, were suspected to be tolerant to glyphosate. A third population from Mississippi, Elizabeth, known to be susceptible to glyphosate, was included for comparison. Plants were treated with the isopropylamine salt of glyphosate at 0, 0.11, 0.21, 0.42, 0.84, 1.68, 3.36, and 6.72 kg ae/ha. GR50(herbicide dose required to cause a 50% reduction in plant growth) values for the Tribbett, Fratesi, and Elizabeth populations were 0.66, 0.66, and 0.22 kg/ha, respectively, indicating that the Tribbett and Fratesi populations were threefold more tolerant to glyphosate compared with the Elizabeth population. These three populations were also treated with diclofop at 0, 0.13, 0.25, 0.5, 0.75, 1, and 2 kg ai/ha. Diclofop GR50values for the Tribbett, Fratesi, and Elizabeth populations were 0.25, 0.28, 0.21 kg/ha, respectively, indicating similar tolerance to diclofop in the three populations. Response of all three populations to clethodim rate (0, 0.02, 0.03, 0.05, 0.06, 0.08, 0.09, and 0.13 kg ai/ha) was measured. Clethodim GR50values for the Tribbett, Fratesi, and Elizabeth populations at the small growth stages were 0.016, 0.023, 0.014 kg/ha, respectively, and at the large growth stage were 0.04, 0.034, 0.02 kg/ha, respectively." |
Language: | English |
References: | 19 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Nandula, V. K., D. H. Poston, T. W. Eubank, C. H. Koger, and K. N. Reddy. 2007. Differential response to glyphosate in Italian ryegrass (Lolium multiflorum) populations from Mississippi. Weed Technol. 21(2):p. 477-482. |
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| DOI: 10.1614/WT-06-168.1 |
| Web URL(s): http://www.bioone.org/doi/full/10.1614/WT-06-168.1 Last checked: 02/29/2012 Access conditions: Item is within a limited access website http://www.bioone.org/doi/pdf/10.1614/WT-06-168.1 Last checked: 02/29/2012 Requires: PDF Reader Access conditions: Item is within a limited access website |
| MSU catalog number: b2174615a |
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