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| Web URL(s): | https://scisoc.confex.com/crops/2015am/webprogram/Paper91383.html
Last checked: 11/16/2015 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | McCullough, Patrick E.;
McElroy, J. Scott;
Yu, Jialin;
Grey, Timothy L.;
Czarnota, Mark |
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| Author Affiliation: | Yu: Plant Pathology; McCullough and Czarnota: University of Georgia - Griffin, Griffin; Grey: Crop and Soil Sciences, University of Georgia, Tifton, GA; McElroy: Auburn University, Auburn, AL Park, KS |
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| Title: | ALS resistant annual sedge confirmed in Georgia |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Turfgrass science: I
Other records with the "Turfgrass science: I" Section
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| Meeting Info.: | Minneapolis, Minnesota: November 15-18, 2015 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2015, p. 91383. |
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| Publishing Information: | [Milwaukee, Wisconsin]: [American Society of Agronomy and the Entomological Society of America] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Acetolactate synthase; Acetolactate synthase-inhibiting herbicides; Cyperaceae; Halosulfuron-methyl; Herbicide efficacy; Herbicide evaluation; Herbicide resistance; Molecular biology; Physiological responses
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| Geographic Terms: | Georgia |
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| Abstract/Contents: | "Acetolactate synthase (ALS) inhibitors are widely used for POST control of sedges (Cyperus spp.) in turfgrass. A suspected resistant (R)-biotype of annual sedge was collected from a bermudagrass turf in Georgia with a history of exclusive use of halosulfuron-methyl. The objectives of this research were to evaluate (1) the resistance levels to halosulfuron-methyl, (2) efficacy of various herbicides for control, and (3) the molecular and physiological basis for resistance. In greenhouse experiments, the halosulfuron-methyl rate required to reduce shoot biomass 50% from the nontreated at 8 weeks after treatment (WAT) measured 8 and >1120 g ai ha-1 for the S and R-biotype, respectively. Imazapic, sulfosulfuron, and trifloxysulfuron-sodium reduced biomass of the S-biotype >60% at 8 WAT, but biomass was reduced ā¤20% for the R-biotype. Glufosinate, glyphosate, MSMA, and sulfentrazone reduced shoot biomass of the R-biotype by 93, 86, 97, and 45%. In laboratory experiments, the halosulfuron-methyl concentration required to inhibit isolated ALS enzymes 50% measured 58 and >1000 mM for the S and R-biotypes, respectively. Gene sequencing of the R-biotype revealed a Pro-197-Ser substitution that confers resistance to ALS-inhibitors. This is the first report of ALS-inhibitor resistance in annual sedge. This is also the first report of ALS-resistance in a sedge species from a turfgrass system." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"218-4" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McCullough, P. E., J. S. McElroy, J. Yu, T. L. Grey, and M. Czarnota. 2015. ALS resistant annual sedge confirmed in Georgia. Agron. Abr. p. 91383. |
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Last checked: 11/16/2015 |
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