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| Web URL(s): | http://www.newss.org/wp-content/uploads/2017/07/2017-NEPPSC-Proceedings-FINAL.pdf#page=107
Last checked: 04/16/2018
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https://www.newss.org/wp-content/uploads/2017/07/2017-NEWSS-Proceedings-FINAL.pdf#page=95
Last checked: 01/23/2023
Requires: PDF Reader
Notes: Item is within a single large file; Proceedings of the Seventy First Annual Meeting of the Northeastern Weed Science Society |
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| Publication Type:
| Proceedings |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Brewer, J. R.;
Rana, S.;
Askew, S. |
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| Author Affiliation: | Virginia Tech, Blacksburg, VA |
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| Title: | Three years of research on Japanese stiltgrass control in managed turf: What have we learned? |
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| Meeting Info.: | Philadelphia, Pennsylvania: January 3-6, 2017 |
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| Source: | Proceedings of the Second Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. 2017, p. 100. |
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| Publishing Information: | s.l.: Northeastern Weed Science Society; Northeastern Regional Branch of the American Society of Agronomy, Crop Science Society of America, & Soil Science Society of America; and American Society of Horticultural Science - Northeastern Division |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cool season turfgrasses; Herbicide efficacy; Herbicide evaluation; Herbicide injury; Microstegium vimineum; Selective weed control
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| Abstract/Contents: | "Previous research in native areas has shown that Japanese stiltgrass (Microstegium vimineum, JSG) is susceptible to nonselective herbicides like glyphosate and selective graminicides like sethoxydim and quizalofop. Few studies have evaluated JSG control in managed turf systems or when using selective herbicides registered for home lawns and other managed turf areas. At Virginia Tech, we have conducted multiple trials over three years to evaluate JSG control in cool-season turfgrass mown at lawn height. In 2014, no treatment injured turf greater than 20% at any rating. In 2015, four treatments injured turf between 30 and 48%, including mesotrione at 280 g ai ha-1 applied once (1X), mesotrione at 280 g ai ha-1 + triclopyr at 1120 g ai ha-1 1X, mesotrione at 140 g ha-1 applied twice at a 3-wk interval (2X), and topramezone at 50 g ha-1 + triclopyr 1X. The difference in injury observed between the two years could be partially due to differences in moisture and temperature at each site. In 2014 at 6 WAIT, all rates of fenoxaprop (140, 70, and 35 g ai ha-1 ) controlled JSG greater than 95% while topramezone at 25 g ai ha-1 2X and topramezone + triclopyr 1X controlled JSG 65 to 68% and all other treatments controlled JSG less than 48%. In 2015, all fenoxaprop and topramezone-containing treatments controlled JSG greater than 95% while all other treatments controlled JSG less than 70%. JSG shoots were counted at the conclusion of both trials. In 2014, all rates of fenoxaprop contained less than 10 shoots per plot, and all other treatments had more than 240 shoots. In 2015, all topramezone and fenoxaprop-containing treatments contained less than 20 shoots per plot while all other treatments had greater than 250 shoots. In a separate study, only fluazifop caused unacceptable injury of 48% to Kentucky bluegrass. Fenoxaprop + fluroxypyr + dicamba (Last Call) at 421 g ai ha-1 , quinclorac + sulfentrazone + dicamba + 2,4-D (Q4) at 1.7 kg ai ha-1 , and fluazifop (Ornamec) at 53 and 105 g ai ha-1 controlled JSG greater than 95% by the end of the trial. Last Call and Q4 injured JSG more quickly than Ornamec. In 2016, the most effective treatments were fenoxaprop (70 g ai ha-1 ) and topramezone (25 g ai ha-1 ) regardless if applied in June or August. At both application timings, fenoxaprop controlled JSG greater than 90% by trial completion. Topramezone controlled JSG between 60 and 70% initially for both timings, but the later application allowed for less regrowth by first frost compared to the early timing (50 and 10% final control, respectively). In a separate 2016 study, sulfentrazone was applied at 5 rates between 0 and 421 g ai ha-1 but only rates at or above 281 g ha-1 transiently injured (between 70 and 80%) JSG 2 WAT. Q4 was also included in this study, but unlike the trial in 2015, Q4 controlled JSG less than 40%. By 8 WAT, no treatment controlled JSG greater than 5%.Differences in Q4 performance between years and transient JSG injury in the sulfentrazone rate study demonstrate that sulfentrazone-containing products may be inconsistent at controlling JSG. These studies indicate that herbicides commonly used for grass control in lawn turf including quinclorac, mesotrione, and sulfentrazone do not control JSG. Fenoxaprop selectively controls JSG at rates of 35 g ai ha-1 or higher and topramezone controls or suppresses JSG at rates of 25 g ai ha-1 or greater." |
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| Language: | English |
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| References: | 0 |
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| Note: | Reprint appears in Proceedings of the Seventy First Annual Meeting of the Northeastern Weed Science Society, Vol. 71 2017, p. 67
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brewer, J. R., S. Rana, and S. Askew. 2017. Three years of research on Japanese stiltgrass control in managed turf: What have we learned?. p. 100. In Proceedings of the Second Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. Philadelphia, Pennsylvania: January 3-6, 2017. s.l.: Northeastern Weed Science Society; Northeastern Regional Branch of the American Society of Agronomy, Crop Science Society of America, & Soil Science Society of America; and American Society of Horticultural Science - Northeastern Division. |
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| Web URL(s):
http://www.newss.org/wp-content/uploads/2017/07/2017-NEPPSC-Proceedings-FINAL.pdf#page=107
Last checked: 04/16/2018
Requires: PDF Reader
Notes: Item is within a single large file
https://www.newss.org/wp-content/uploads/2017/07/2017-NEWSS-Proceedings-FINAL.pdf#page=95
Last checked: 01/23/2023
Requires: PDF Reader
Notes: Item is within a single large file; Proceedings of the Seventy First Annual Meeting of the Northeastern Weed Science Society |
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