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| Web URL(s): | http://newss.org/proceedings/proceedings_2009.pdf#page=39
Last checked: 07/17/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Mansue, C.;
Hart, S. E. |
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| Author Affiliation: | Rutgers University, New Brunswick, NJ |
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| Title: | Response of newly seeded Kentucky bluegrass cultivars to mesotrione |
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| Section: | Research posters
Other records with the "Research posters" Section
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| Meeting Info.: | Baltimore, Maryland: January 6-8, 2009 |
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| Source: | Proceedings of the Sixty-Third Annual Meeting of the Northeastern Weed Science Society. Vol. 63, 2009, p. 24. |
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| Publishing Information: | Baltimore, Maryland: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cultivar evaluation; Mesotrione; Oxalis stricta; Poa annua; Poa pratensis; Poa pratensis X Poa arachnifera; Portulaca oleracea; Senecio vulgaris; Stellaria media
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| Cultivar Names: | Avalanche; Kingfisher; America; Bedazzled; Thermal Blue; Award; Washington; Midnight II |
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| Abstract/Contents: | "Field experiments were conducted in the fall of 2007 and 2008 to evaluate the response of newly seeded Kentucky bluegrass (Poa pratensis L.) cultivars to mesotrione. Kentucky bluegrass cultivars that were evaluated in these experiments were 'Avalanch', 'Kingfisher', 'America', 'Bedazzal', 'Thermal', 'P105', 'Award', 'Washington' and 'Midnight II'. Experimental Design was a strip plot with 4 replications. Cultivars were seeded in 1.8 m strips at a rate of 48 kg/ha on September 14 and 18th in 2007 and 2008, respectively. Mesotrione was applied at 0.28, 0.56, 1.1 or 2.2 kg ai/Ha at planting as a single treatment or as a sequential treatment at the same application rates 4 weeks after emergence (WAE). Sequential applications included nonionic surfactant (NIS) at 0.25% v/v. Plots were evaluated for percent cover at 2, 4, and 8 WAE as well as the following spring. Mesotrione at 0.28 kg/Ha applied at planting did not reduce cover relative to the untreated at any observation time. The cover of 'America" was reduced at 0.56 kg/ha of mesotrione 2 WAE, but full recovery was observed at 4 WAE. Mesotrione at 1.1 kg/ha reduced the cover of all cultivars at 2 WAE with the exception of 'Midnight II' while 2.2 kg/ha reduced cover of all cultivars. Cover reductions at this rate were as high as 90% for some cultivars. Some cultivars such as 'Avalanch', 'Washington', 'Thermal', and 'Award' recovered from 1.1 kg/ha mesotrione at 8 WAE but not from 2.2 kg/ha. Cover reductions were still evident the following spring for some cultivars at 1.1 kg/ha and all cultivars at 2.2 kg/ha the following spring. Sequential applications of mesotrione at 0.28 kg/ha did not reduce cover of any cultivars. However, rates of 0.56 kg/ha or higher reduced cover of all cultivars at 8 WAE. All cultivars with the exception of 'Midnight II', 'Washington', and 'Award' did not fully recover from sequential applications of 0.56 kg/ha into the following spring, while no cultivars fully recovered from the higher sequential application rates. Mesotrione applied at 0.28 kg/ha at planting provided complete control of common groundsel (Senecio vulgaris L.), common chickweed (Stellaria media (L.) Vill.), common purslane (Portulaca oleracea L.), and yellow woodsorrel (Oxalis stricta L.). Annual bluegrass (Poa annua L.) control was 84 and 93%, respectively at 0.28 kg/ha applied at planting or as a sequential treatment. The results of the first year of this study suggest that differential tolerance of Kentucky bluegrass cultivars may exist but higher than labeled use rates of mesotrione were required to observe these differences." |
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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):
Mansue, C., and S. E. Hart. 2009. Response of newly seeded Kentucky bluegrass cultivars to mesotrione. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 63:p. 24. |
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| Web URL(s):
http://newss.org/proceedings/proceedings_2009.pdf#page=39
Last checked: 07/17/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 |
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