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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2007.pdf#page=104
Last checked: 07/01/2013
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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): | Willis, J. B.;
Askew, S. D. |
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| Author Affiliation: | Virginia Tech, Blacksburg |
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| Title: | Use of triclopyr to reduce antichromatic effects of mesotrione in turfgrass |
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| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
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| Meeting Info.: | Baltimore, Maryland: January 2-5, 2007 |
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| Source: | Proceedings of the Sixty-First Annual Meeting of the Northeastern Weed Science Society. Vol. 61, 2007, p. 86. |
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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: Color retention; Herbicide evaluation; Herbicide injury; Mesotrione; Tank mix; Triclopyr
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| Abstract/Contents: | "Chromatic is defined as all colors other than white, black, and pure gray. When phydroxyphenylpyruvate dioxygenase inhibitors (HPPD) are applied to susceptible plants, leaves turn white. This response can be described as antichromatic. Mesotrione is an HPPD inhibitor that is currently being evaluated for use in turfgrass. Many turfgrass managers have indicated that their clientele will be unpleased with discoloration caused by mesotrione. Previous research at Virginia Tech evaluated all combinations of mesotrione, triclopyr, and fenoxaprop-P for common bermudagrass control. An interesting result was that plots treated with combinations of mesotrione and triclopyr had higher turf color than plots treated with mesotrione alone. Therefore, we speculate that triclopyr is an effective tank-mix partner for reducing antichromatic effects of mesotrione and improving efficacy towards perennial broadleaf weeds. Our objective is to evaluate mesotrione plus triclopyr for effects on turfgrass and weed color and control. Studies were conducted at two low-maintenance lawn locations and used a 2 by 4 factorial treatment arrangement. The first factor was single or sequential treatment and the second factor was the following herbicide treatment combinations: mesotrione at 0.125 lb ai/A, triclopyr at 1 lb ai/A, mesotrione + triclopyr, and an industry standard for broadleaf weeds, SpeedZone® at 4pt/A. Fenoxaprop-P at 0.12 lb ai/A applied twice and a nontreated check were included as comparison treatments. Sequential applications were made at 3-wk intervals. Turf color was visually estimated (9 = ideal green; 1 = no green) based on an assessment of both desirable turfgrass and weeds. Tank-mixing mesotrione and triclopyr improves turf color compared to mesotrione alone. Turf color was reduced by mesotrione alone mostly due to whitened nimblewill (NW) and white clover, the predominant weed species accounting for 40-60% of initial ground cover. Results from previous research with mesotrione indicate that single applications do not effectively control NW, and adding triclopyr in the current trial did not improve NW control with single applications. However, triclopyr does not decrease NW control by mesotrione although it greatly increase turf color by eliminating antichromatic effects of mesotrione on NW. NW control 60 DAT was equivalent between sequential applications of mesotrione alone and mesotrione plus triclopyr and averaged 65% at one location and 78% at another location while no other treatment controlled NW. Sequential applications of mesotrione and single applications of triclopyr effectively control ground ivy. Tank mixing mesotrione and triclopyr with one application improved ground ivy control to 97% compared to 0 and 70% control by single applications of mesotrione and triclopyr, respectively with similar effects on broadleaf plantain. PowerZone® controlled broadleaf plantain and not ground ivy. Mesotrione controlled white clover only when mixed with triclopyr. The combination of mesotrione and triclopyr both reduces the antichromatic response of susceptible species and adds control of perennial broadleaf weeds that mesotrione alone does not control. Ongoing research is evaluating mesotrione plus triclopyr compared to each product alone for injury to Kentucky bluegrass, perennial ryegrass, bermudagrass, tall fescue, and fine fescue." |
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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):
Willis, J. B., and S. D. Askew. 2007. Use of triclopyr to reduce antichromatic effects of mesotrione in turfgrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 61:p. 86. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2007.pdf#page=104
Last checked: 07/01/2013
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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