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DOI: | 10.1614/WT-D-15-00153.1 |
Web URL(s): | http://www.bioone.org/doi/full/10.1614/WT-D-15-00153.1 Last checked: 08/03/2016 Access conditions: Item is within a limited-access website http://www.bioone.org/doi/pdf/10.1614/WT-D-15-00153.1 Last checked: 08/03/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Yu, Jialin;
McCullough, Patrick E. |
Author Affiliation: | Yu: Postdoctoral Researcher; McCullough: Associate Professor, Crop and Soil Sciences Department, University of Georgia, Griffin, GA |
Title: | Growth stage influences mesotrione efficacy and fate in two bluegrass (Poa) species |
Section: | Weed management - Other crops/areas Other records with the "Weed management - Other crops/areas" Section
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Source: | Weed Technology. Vol. 30, No. 2, April-June 2016, p. 524-532. |
Publishing Information: | Champaign, Illinois: Weed Science Society of America |
# of Pages: | 9 |
Related Web URL: | http://www.bioone.org/doi/abs/10.1614/WT-D-15-00153.1 Last checked: 08/03/2016 Notes: Abstract only |
Keywords: | TIC Keywords: Application timing; Growth analysis; Growth stages; Herbicide efficacy; Herbicide evaluation; Mesotrione; Poa annua control; Poa pratensis; Tillering rate
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Cultivar Names: | Midnight |
Abstract/Contents: | "Mesotrione provides PRE and early POST control of annual bluegrass during Kentucky bluegrass establishment from seed, but applications do not effectively control multitiller 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: pretiller (3 to 5 leaves), 1-tiller, and multitiller (5 to 7 tillers). In greenhouse experiments, a single mesotrione application at 280 g ai ha-1 injured pretiller, 1-tiller, and multitiller annual bluegrass 54, 33, and 11% at 4 wk after initial treatment (WAIT), respectively. A sequential application of mesotrione increased injury to pretiller and 1-tiller annual bluegrass by 20 and 17% from a single treatment, respectively. Sequential mesotrione applications caused at least 14% injury to multitiller annual bluegrass and Kentucky bluegrass at all growth stages and did not reduce tillering compared to the nontreated. Annual bluegrass absorbed 34% more root-applied 14C-mesotrione than Kentucky bluegrass in hydroponic culture, but relative differences (Bq g-1) among growth stages were not detected for both species. Averaged across growth stages, annual and Kentucky bluegrass absorbed 31 and 35% of the applied radioactivity after foliar treatments, respectively. However, averaged across species, multitiller plants metabolized approximately two times more 14C-mesotrione than pretiller 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 multitiller annual bluegrass due to enhanced degradation compared to pretiller and 1-tiller plants." |
Language: | English |
References: | 34 |
Note: | Abstract also appears in Spanish Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Yu, J., and P. E. McCullough. 2016. Growth stage influences mesotrione efficacy and fate in two bluegrass (Poa) species. Weed Technol. 30(2):p. 524-532. |
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| DOI: 10.1614/WT-D-15-00153.1 |
| Web URL(s): http://www.bioone.org/doi/full/10.1614/WT-D-15-00153.1 Last checked: 08/03/2016 Access conditions: Item is within a limited-access website http://www.bioone.org/doi/pdf/10.1614/WT-D-15-00153.1 Last checked: 08/03/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: b2174615a |
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