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DOI: | 10.2135/cropsci2015.06.0359 |
Web URL(s): | https://dl.sciencesocieties.org/publications/cs/articles/56/3/1306 Last checked: 05/20/2016 Access conditions: Item is within a limited-access website https://dl.sciencesocieties.org/publications/cs/pdfs/56/3/1306 Last checked: 05/20/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | McCullough, Patrick E.;
Yu, Jialin;
Johnston, Christopher R. |
Author Affiliation: | Dep. of Crop and Soil Sciences, Univ. of Georgia, Griffin, GA |
Title: | Physiological basis for bermudagrass control with ethofumesate in seashore paspalum and St. Augustinegrass |
Section: | Turfgrass science Other records with the "Turfgrass science" Section
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Source: | Crop Science. Vol. 56, No. 3, May/June 2016, p. 1306-1313. |
Publishing Information: | Madison, Wisconsin: Crop Science Society of America |
# of Pages: | 8 |
Related Web URL: | https://dl.sciencesocieties.org/publications/cs/abstracts/56/3/1306 Last checked: 05/25/2016 Notes: Abstract only |
Keywords: | TIC Keywords: Bermudagrass control; Cynodon; Ethofumesate; Foliar uptake; Herbicide efficacy; Herbicide evaluation; Herbicide resistance; Herbicide selectivity; Paspalum vaginatum; Selective grass herbicides; Stenotaphrum secundatum; Volatility; Weed control
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Abstract/Contents: | "Bermudagrass is a problematic weed in seashore paspalum and St. Augustinegrass with limited options for control. Ethofumesate is the only herbicide labeled for bermudagrass control in these turfgrasses, but the physiological basis for selectivity is not well understood. The objectives of this research were to evaluate the efficacy and fate of ethofumesate in bermudagrass, seashore paspalum, and St. Augustinegrass. In the greenhouse, ethofumesate rate that reduced shoot biomass 50% from the nontreated plants was 3.8, >27, and >27 kg a.i. ha-1 for bermudagrass, seashore paspalum, and St. Augustinegrass, respectively. In the laboratory, absorption of 14C-ethofumesate ranked bermudagrass > seashore paspalum > St. Augustinegrass from root uptake, and bermudagrass > seashore paspalum = St. Augustinegrass from foliar uptake. St. Augustinegrass translocated ~20% less of the total absorbed radioactivity to shoots than the other grasses after root uptake. Metabolism of 14C-ethofumesate ranked bermudagrass > St. Augustinegrass > seashore paspalum. All grasses metabolized the herbicide to ethofumesate-2-keto, methanesulfonic acid, and another polar metabolite. Of all grasses, seashore paspalum produced the highest and lowest levels of ethofumeaste-2-keto and methanesulfonic acid, respectively. Radioactivity recovery linearly decreased by 81 to 35% of the applied 14C, from 1 to 7 days after treatment, suggesting volatilization is a major contributor to ethofumesate losses. The susceptibility of bermudagrass to ethofumesate results from greater absorption than seashore paspalum and St. Augustinegrass. The intermediate tolerance of seashore paspalum to ethofumesate results from root absorption rather than foliar uptake. Metabolism rate does not appear to be correlated with tolerance levels of these species to ethofumesate." |
Language: | English |
References: | 32 |
See Also: | Other items relating to: Seashore Paspalum - Since 2000 |
Note: | Equation Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): McCullough, P. E., J. Yu, and C. R. Johnston. 2016. Physiological basis for bermudagrass control with ethofumesate in seashore paspalum and St. Augustinegrass. Crop Sci. 56(3):p. 1306-1313. |
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| DOI: 10.2135/cropsci2015.06.0359 |
| Web URL(s): https://dl.sciencesocieties.org/publications/cs/articles/56/3/1306 Last checked: 05/20/2016 Access conditions: Item is within a limited-access website https://dl.sciencesocieties.org/publications/cs/pdfs/56/3/1306 Last checked: 05/20/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: b2211522a |
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