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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=211
Last checked: 08/07/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Askew, S.;
Zawierucha, J.;
Oliver, G.;
Miller, K. |
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| Author Affiliation: | Askew: Virginia Tech, Blacksburg; Miller: BASF, Richmond, VA; Zawierucha: BASF Corp, Research Triangle Park; Oliver: BASF, Raleigh, NC |
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| Title: | Weed control in cool-season turfgrass with topramezone |
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| Section: | Weed management in turf crops
Other records with the "Weed management in turf crops" Section
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| Meeting Info.: | Charleston, South Carolina: January 23-25, 2012 |
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| Source: | 2012 Proceedings, Southern Weed Science Society. Vol. 65, 2012, p. 139. |
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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: Application timing; Broadleaf weed control; Comparisons; Cool season turfgrasses; Crabgrass control; Digitaria ischaemum; Herbicide evaluation; Mesotrione; Topramezone; Weed control
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| Abstract/Contents: | "Topramezone was registered for use in corn in July 2005. It is currently under evaluation for use in turfgrass. Topramezone inhibits HPPD and exhibits turfgrass tolerance and weed control that is similar to other HPPD inhibiting herbicides such as mesotrione and tembotrione. Studies were conducted in Blacksburg, VA in 2008 to evaluate various programs and application timings for smooth crabgrass and broadleaf weed control using topramezone compared to mesotrione. Six different field trials were conducted to evaluate topramezone at various rates, timings, and in various tank mixtures for cool-season turfgrass tolerance and weed control. The six field trials comprise three different studies that were each conducted at two sites. Topramezone was applied at rates between 13 and 100 g ai ha-1. Mesotrione was applied at 230 or 280 g ai ha-1. Tank mixtures of pendimethalin at 1680 g ai ha-1 plus topramezone and prodiamine at 730 g ai ha-1 plus mesotrione were also evaluated. Topramezone treatments included crop oil concentrate at 1% v/v and mesotrione treatments included nonionic surfactant at 0.25% v/v. All treatments were applied at 280 L ha-1 using Teejet flat fan 8004 nozzles at 262 kPa. Studies were all initiated on May 15 when crabgrass had one to three leaves. When applied once to 1- to 3-leaf smooth crabgrass, topramezone at 25 g ai ha-1 controlled smooth crabgrass 53% on average and more than mesotrione at 230 or 280 g ai ha-1 (7%) at four locations 118 to 121 days after initial treatment (DAIT). When topramezone and mesotrione were mixed with pendimethalin and prodiamine, respectively, 1- to 3-leaf crabgrass control increased to 93% with 25 g ha-1 topramezone and 78% with mesotrione. When applied to 2- to 3-tiller smooth crabgrass, a single treatment of topramezone at 13 g ha-1 controlled smooth crabgrass equivalent to 230 g ha-1 mesotrione. At 118 DAIT, topramezone at 25 g ha-1 controlled smooth crabgrass 72%, representing a 40% increase in control over mesotrione. Two applications of 25 g ha-1 topramezone controlled 2- to 3-tiller smooth crabgrass 90% 118 DAIT and more than two applications of 230 g ha-1 mesotrione, which controlled smooth crabgrass 65% on the same date. Similar results occurred when 5- to 7-tiller smooth crabgrass was treated compared to 2- to 3-tiller smooth crabgrass. Mesotrione did not control white clover or broadleaf plantain, while topramezone almost completely controlled white clover and controlled broadleaf plantain 60 to 90% 28 DAIT and 10 to 30% 78 DAIT. Topramezone controlled corn speedwell more than mesotrione on three of four rating dates. Topramezone at 25 g ha-1 was inferior to mesotrione for dandelion control. Topramezone appears to control several key weed species, often with single treatments. Topramezone, at the lowest rates evaluated, was equivalent or better than mesotrione for control of most weeds tested. These results indicate topramezone could be an important herbicide for the turfgrass industry." |
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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):
Askew, S., J. Zawierucha, G. Oliver, and K. Miller. 2012. Weed control in cool-season turfgrass with topramezone. South. Weed Sci. Soc. Proc. 65:p. 139. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=211
Last checked: 08/07/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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