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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=400
Last checked: 08/06/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Smith, Adam;
Goddard, Matthew;
Askew, Shawn D. |
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| Author Affiliation: | Virginia Tech, Blacksburg |
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| Title: | Differential absorption and translocation of mesotrione in Kentucky bluegrass (Poa pratensis L.) and annual bluegrass (Poa annua L.). |
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| Section: | Posters: Weed management in turf
Other records with the "Posters: Weed management in turf" Section
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| Meeting Info.: | San Juan, Puerto Rico: January 24-26, 2011 |
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| Source: | 2011 Proceedings, Southern Weed Science Society. Vol. 64, 2011, p. 292. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Absorption rate; Application methods; Herbicide evaluation; Mesotrione; Poa annua; Poa pratensis; Translocation
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| Abstract/Contents: | "Mesotrione is a HPPD inhibiting herbicide recently registered for use in turfgrass in the United States. It provides PRE and POST weed control in select cool and warm season turfgrasses. Susceptible plants express white discoloration when treated with mesotrione. Turfgrass tolerances vary and herbicide selectivity is due to differential absorption rates and herbicide metabolism. Annual bluegrass is severely injured by mesotrione, while Kentucky bluegrass is one of the most tolerant turfgrass species. Research has evaluated plant response to mesotrione under different environmental conditions, but none have examined absorption and translocation in turfgrass species. Using radiolabeled 14C mesotrione, laboratory experiments were conducted to investigate interspecific absorption and translocation differences in mesotrione activity between annual and Kentucky bluegrass when 14C mesotrione is applied to plant foliage and roots. Experiments were initiated on July 10 and September 16, 2009. The experiments were arranged in a split-split plot design with the main plots being harvest timings (0.17, 4, 24, 48, 96, 144 hrs), sub-plots being a 2x2 factorial containing plant species (annual vs. Kentucky bluegrass) and two mesotrione applications (leaf applied vs. root applied), and sub-sub plots being plant partitions (treated foliage, treated root, other foliage, other roots, root exudates). 14C was extracted from treated plants and analyzed with a liquid scintillation spectrometer. Annual bluegrass absorbed more mesotrione than Kentucky bluegrass. In both species, mesotrione absorption was less through the roots than through foliage. Root absorbed mesotrione was often found in root exudates, whereas foliage absorbed mesotrione was found to translocate to foliage other than the treated leaf. Annual bluegrass had a 4 and 2-fold increase in foliar absorption (46 and 50%), when compared to Kentucky bluegrass (11 and 29%). These interspecific differences in absorption and translocation may play a role in explaining mesotrione tolerance in Kentucky bluegrass and susceptibility in annual bluegrass." |
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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):
Smith, A., M. Goddard, and S. D. Askew. 2011. Differential absorption and translocation of mesotrione in Kentucky bluegrass (Poa pratensis L.) and annual bluegrass (Poa annua L.).. South. Weed Sci. Soc. Proc. 64:p. 292. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=400
Last checked: 08/06/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b2207931 |
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Digitally in TIC by file name: swssp2011 |
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