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| Web URL(s): | http://www.newss.org/proceedings/Proceedings_NEPPSC16_Vol1.pdf#page=104
Last checked: 03/15/2018
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Proceedings |
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| Content Type: | Abstract or Summary Only |
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| Author(s): | Yu, J.;
McCullough, P. |
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| Author Affiliation: | University of Georgia, Griffin, GA |
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| Title: | Mesotrione efficacy and fate in annual bluegrass and Kentucky bluegrass as influenced by growth stage |
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| Section: | Research posters
Other records with the "Research posters" Section
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| Meeting Info.: | Philadelphia, Pennsylvania: January 3-7, 2016 |
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| Source: | Proceedings of the First Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. 2016, p. 78. |
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| Publishing Information: | s.l.: Northeastern Weed Science Society; the Eastern Branch of the Entomological Society of America; the Northeastern Division of the American Phytopathological Society; the Northeast Branch of the American Society of Agronomy; the Crop Science Society of America; the Soil Science Society of America; and the American Society of Horticultural Science-Northeast Region |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Growth stages; Herbicide efficacy; Herbicide evaluation; Mesotrione; Poa annua; Poa annua control; Poa pratensis
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| Abstract/Contents: | "Mesotrione provides PRE and early-POST control of annual bluegrass during Kentucky bluegrass establishment from seed, but applications do not effectively control multi-tiller plants. The physiological effects of growth stage on efficacy and the basis of mesotrione selectivity between species is not well understood. The objectives of this research were to evaluate mesotrione behavior in these species at three growth stages: pre-tiller (3 to 5 leaves), 1-tiller, and multi-tiller (5 to 7 tillers). In greenhouse experiments, single mesotrione application at 0.28 kg ai ha-1 injured pre-tiller, 1-tiller, and multi-tiller annual bluegrass 54, 33, and 11 percent at 4 weeks after initial treatment (WAIT), respectively. Sequential applications of mesotrione increased injury to pre-tiller and 1-tiller annual bluegrass by ~20 percent from a single treatment. Mesotrione reduced annual bluegrass tiller counts ~60 percent from the nontreated at the pre-tiller and 1-tiller stage. Sequential mesotrione applications caused =14 percent injury to multi-tiller annual bluegrass and Kentucky bluegrass at all growth stages, and did not reduce tillering from the nontreated. Annual bluegrass absorbed 34 percent more rootapplied 14C-mesotrione than Kentucky bluegrass in hydroponic culture, but relative differences (Bq g-1 ) among growth stages were not detected. Annual and Kentucky bluegrass absorbed 31 percent and 35 percent of the applied radioactivity after foliar treatments, respectively. Differences in 14C translocation and metabolism were not detected between species, and foliar uptake levels were similar across growth stages. However, multi-tiller plants metabolized ~2-times more 14C-mesotrione than pre-tiller and 1-tiller plants. Overall, the selectivity of mesotrione for annual bluegrass control during Kentucky bluegrass establishment results from differential levels of root absorption. Mesotrione has limited efficacy for controlling multi-tiller annual bluegrass due to enhanced degradation compared to pre-tiller and 1-tiller plants." |
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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):
Yu, J., and P. McCullough. 2016. Mesotrione efficacy and fate in annual bluegrass and Kentucky bluegrass as influenced by growth stage. p. 78. In Proceedings of the First Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. Philadelphia, Pennsylvania: January 3-7, 2016. s.l.: Northeastern Weed Science Society; the Eastern Branch of the Entomological Society of America; the Northeastern Division of the American Phytopathological Society; the Northeast Branch of the American Society of Agronomy; the Crop Science Society of America; the Soil Science Society of America; and the American Society of Horticultural Science-Northeast Region. |
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| Web URL(s):
http://www.newss.org/proceedings/Proceedings_NEPPSC16_Vol1.pdf#page=104
Last checked: 03/15/2018
Requires: PDF Reader
Notes: Item is within a single large file |
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