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| Web URL(s): | http://a-c-s.confex.com/crops/2008am/webprogram/Paper40817.html
Last checked: 02/27/2009 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Perry, D. Hunter;
McElroy, J. S.;
Walker, R. H. |
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| Author Affiliation: | Agronomy and Soils, Auburn University, Auburn, Alabama |
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| Title: | Creeping bentgrass phytotoxicity and photochemical efficiency response to amicarbazone |
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| Section: | Graduate student poster competition: II. Diseases, genetics, physiology and technology (posters)
Other records with the "Graduate student poster competition: II. Diseases, genetics, physiology and technology (posters)" Section
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| Meeting Info.: | Houston, Texas: October 5-9, 2008 |
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| Source: | 2008 Joint Annual Meeting: [Abstracts][GSA/SSSA/ASA/CSSA/GCAGS/HGS]. 2008, p. 40817. |
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| Publishing Information: | [Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America; Boulder, CO: Geological Society of America; Austin, TX: Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM; Houston, TX: Houston Geological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Amicarbazone; Application rates; Photochemical efficiency; Photosystem II; Physiological responses; Phytotoxicity
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| Abstract/Contents: | "Amicarbazone is a new herbicide currently being evaluated for potential control of annual bluegrass (Poa annua L.) in creeping bentgrass (Agrostis palustris Huds.). Amicarbazone is a photosystem II inhibiting herbicide, similar in mode of action to atrazine and simazine. Research was conducted to evaluate creeping bentgrass physiological response to increasing rates of amicarbazone compared to standard rates of paclobutrazol. Amicarbazone rates were 0.1, 0.2, 0.3, and 0.4 kg ai/ha. Paclobutrazol rates were 0.6 and 1.2 kg ai/ha. All treatments were applied with 0.25% v/v non-ionic surfactant to a creeping bentgrass putting green. Physiological response was measured utilizing a pulse-modulated chlorophyll fluorometer and photochemical efficiency (Fv/Fm) measurements were standardized relative to the non-treated. All amicarbazone treatments decreased creeping bentgrass Fv/Fm greater than the non-treated and paclobutrazol treatments at 7 and 14 days after treatment (DAT). Amicarbazone at 0.1 kg ai/ha decreased Fv/Fm 47% compared to the non-treated and measurements continued to decrease as rates were increased. Amicarbazone at 0.3 kg ai/ha, decreased Fv/Fm 78, 53, 39, 20, and 12% compared to the non-treated at 7, 14, 21, 28, and 42 DAT respectively. Paclobutrazol at 0.6 kg ai/ha decreased Fv/Fm 14% at 7 DAT while at 1.2 kg ai/ha Fv/Fm was similar to the non-treated. All treatments recovered by 42 DAT. The results of this study suggest that increasing rates of amicarbazone do reduce the photochemical response of creeping bentgrass compared to standard rates of paclobutrazol." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Perry, D. H., J. S. McElroy, and R. H. Walker. 2008. Creeping bentgrass phytotoxicity and photochemical efficiency response to amicarbazone. Joint Ann. Meet. p. 40817. |
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Last checked: 02/27/2009 |
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