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| DOI: | 10.2134/agronj14.0467 |
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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/articles/107/3/997
Last checked: 07/08/2015
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https://dl.sciencesocieties.org/publications/aj/pdfs/107/3/997
Last checked: 07/08/2015
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Singh, Rashmi;
Sidhu, Sudeep S.;
Czarnota, Mark A.;
McCullough, Patrick E. |
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| Author Affiliation: | Dep. of Crop and Soil Sciences, Univ. of Georgia, Griffin, GA |
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| Title: | Differential behavior of two Photosystem II inhibitors in seashore paspalum |
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| Section: | Agronomy, soils & environmental quality
Other records with the "Agronomy, soils & environmental quality" Section
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| Source: | Agronomy Journal. Vol. 107, No. 3, May/June 2015, p. 997-1001. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy |
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| # of Pages: | 5 |
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| Related Web URL: | https://dl.sciencesocieties.org/publications/aj/abstracts/107/3/997
Last checked: 07/08/2015
Notes: Abstract only |
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| Keywords: | TIC Keywords: Amicarbazone; Atrazine; Herbicide efficacy; Herbicide evaluation; Herbicide rotation; Herbicide translocation; Paspalum vaginatum; Photosystem II; Physiological responses; Postemergence weed control; Root-shoot ratio; Triazines
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| Cultivar Names: | Sea Isle I |
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| Abstract/Contents: | "Seashore paspalum (Paspalum vaginatum Sw.) injury from triazines has limited the mechanisms of action used for postemergence (POST) weed control. Seashore paspalum is tolerant to a new Photosystem (PS) II inhibitor, amicarbazone (4-amino-N-tert-butyl-4, 5-dihydro-3-isopropyl-5-oxo-1H-1, 2,4-triazole-1-carboxamide), but the physiological behavior attributed to differential tolerances from triazines has received limited investigation. The objectives of this research were to evaluate efficacy, absorption, translocation, and metabolism of 14C-amicarbazone and 14C-atrazine (1-chloro-3-ethylamino-5-isopropylamino-2,4,6-triazine) in cultivar Sea Isle 1 seashore paspalum. In greenhouse experiments, atrazine treatments (560, 1120 or 2240 g a.i. ha-1) reduced shoot mass from the nontreated two times greater than amicarbazone treatments (98, 196, or 392 g a.i. ha-1). In laboratory experiments, foliar absorption of 14C-amicarbazone increased from 1 to 7 days after treatment (DAT) but peak absorption of 14C-atrazine occurred after 1 d. The 14C translocation from both herbicides was similar following root and shoot absorption. Seashore paspalum metabolized approximately two times more amicarbazone than atrazine after 1 d in foliar and root absorption experiments. From root absorption, seashore paspalum produced three metabolites of amicarbazone in roots and shoots at 1 and 3 DAT but only one metabolite of atrazine was found after 1 d. Three metabolites of atrazine were recovered at 3 DAT in shoots but only one metabolite was found in roots. Overall, faster metabolism in roots and shoots contributes to the greater tolerance of seashore paspalum to amicarbazone compared to atrazine." |
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| Language: | English |
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| References: | 29 |
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| See Also: | Other items relating to: Seashore Paspalum - Since 2000 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Singh, R., S. S. Sidhu, M. A. Czarnota, and P. E. McCullough. 2015. Differential behavior of two Photosystem II inhibitors in seashore paspalum. Agron. J. 107(3):p. 997-1001. |
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| DOI: 10.2134/agronj14.0467 |
| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/articles/107/3/997
Last checked: 07/08/2015
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/aj/pdfs/107/3/997
Last checked: 07/08/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2212646a |
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