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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2010.pdf#page=32
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Venner, K.;
Hart, S.;
Mansue, C. |
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| Author Affiliation: | Rutgers University, New Brunswick, NJ |
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| Title: | Use of mesotrione for annual bluegrass control at Kentucky bluegrass establishment |
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| Meeting Info.: | Cambridge, MA: January 4-7, 2010 |
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| Source: | Proceedings: 64th Annual Meeting of the NortheasternWeed Science Society. Vol. 64, 2010, p. 16. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Application methods; Cultivar evaluation; Cultivar variation; Herbicide resistance; Mesotrione; Poa annua control; Poa pratensis
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| Cultivar Names: | Midnight II |
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| Abstract/Contents: | "Field studies were conducted in the fall of 2007 to the spring of 2009 to evaluate the response of newly seeded Kentucky bluegrass cultivars to mesotrione applied at planting (PRE) and PRE followed by (fb) sequential treatments four weeks after turfgrass emergence (WAE) at rates ranging from 0.28 to 2.24 kg ai/ha. In separate studies annual bluegrass control in newly seeding 'Midnight II' Kentucky bluegrass was evaluated with mesotrione applied PRE fb sequential treatments 4 and 8 WAE at 0.14 to 0.56 kg/ha. All applications were made with a single 9504E nozzle CO2 pressured sprayer calibrated to deliver a total 375 L/ha at 220 kPa. Experimental designs were a strip-plot with four replications for the Kentucky bluegrass cultivar study and a randomized complete block with four replications for the annual bluegrass control study. Kentucky bluegrass cultivars 'America', 'P-105', 'Midnight II', 'Avalanche', 'Kingfisher', 'Washington', 'Bedazzled', 'Thermal', and 'Award' were seeded on 8-28-07, and 9-16-08 at 1.7 kg/ha in 1.8 m rows with a drop spreader. Annual bluegrass control studies were initiated on 9-13-07 and 9-22-08. Kentucky bluegrass cover and annual bluegrass control were visually evaluated in December and the following spring on a scale of 0 (no cover or control) to 100 (complete cover or control). In the Kentucky bluegrass cultivar study significant cover reductions were not evident across all Kentucky bluegrass cultivars at rates of 0.28 and 0.56 kg/ha. Cover reductions were evident on some cultivars at rates of 1.12 and 2.24 kg/ha and sequential applications further reduced cover. A high degree of intraspecific variability was evident with cultivars 'Thermal' and 'Washington' showing the most tolerance while 'Kingfisher' and 'Avalanche' were the most sensitive. In the annual bluegrass control studies, nearly complete control of winter annual broadleaf weeds such as chickweed, henbit, oxalis, and veronica were observed at all application rates. 'Midnight II' cover was not significantly reduced by mesotrione. Annual bluegrass control ranged from 61 to 94% and increased with increasing mesotrione rate. Annual bluegrass control was 83% and 0.28 kg/ha averaged across the three application regimes. Applying a sequential application of mesotrione at 4 WAE increase annual bluegrass control to 80% from 74% compared with a single PRE application. Applying a third application of mesotrione at 8 WAE did not further increase annual bluegrass control compared with two applications. The results of these studies suggest that the overall tolerance of Kentucky bluegrass is excellent and mesotrione can be safely used at establishment for high levels but not complete annual bluegrass control." |
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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):
Venner, K., S. Hart, and C. Mansue. 2010. Use of mesotrione for annual bluegrass control at Kentucky bluegrass establishment. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 64:p. 16. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2010.pdf#page=32
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 60 |
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