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| Web URL(s): | http://www.newss.org/wp-content/uploads/2017/07/2017-NEPPSC-Proceedings-FINAL.pdf#page=74
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https://www.newss.org/wp-content/uploads/2017/07/2017-NEWSS-Proceedings-FINAL.pdf#page=73
Last checked: 01/23/2023
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| Publication Type:
| Proceedings |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Craft, J. M.;
Brewer, J. R.;
Askew, S. |
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| Author Affiliation: | Virginia Tech, Blacksburg, VA |
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| Title: | Zoysiagrass response to herbicide during greenup |
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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. 66. |
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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: Application timing; Cultivar evaluation; Herbicide application; Herbicide efficacy; Herbicide evaluation; Herbicide injury; Spring green-up; Zoysia
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| Abstract/Contents: | "Turf managers in the transition zone have adopted the strategy of late winter applications of the nonselective and selective herbicides on bermudagrass (Cynodon dactylon) but are hesitant to apply late winter application to zoysiagrass (Zoysia ssp.) due to its perceived sensitivity to herbicides. Previous research suggest that proper timing can maximize weed control and ensure zoysiagrass safety. Three Virginia studies were conducted in the spring of 2016 to evaluate several herbicides and application timings based on growing degree day at base 32 F (GDD32) accumulation for weed control and response of three different zoysiagrass varieties. At Westlake Golf Course near Hardy, VA, 18 treatments were evaluated for annual bluegrass (Poa annua L.) control and response of Zeon zoysiagrass with herbicide treatments applied at 200 GDD32. Two additional sites were conducted at Virginia Techs Turfgrass Research Center in Blacksburg, VA, on a half and half mixture of Companion and Zenith zoysiagrass maintained at 5 cm height and Meyer zoysiagrass maintained at 1.5 cm height with treatments applied at 400 and 600 GDD32. At the 200 GDD32 application timing, no treatment caused more than 35% turf injury. At 4 WAT, glyphosate at 716 g ai ha-1 , glufosinate at 1628 g ai ha-1 , flumioxazin at 214 g ai ha-1 , foramsulfuron at 28 g ai ha-1 , flazasulfuron at 77 g ai ha-1 , and trifloxysulfuron-sodium at 16 g ai ha-1 controlled annual bluegrass 90% when applied at 200 GDD32. Mixtures of flumioxazin and glyphosate controlled annual bluegrass less than either herbicide applied alone. At 4 WAT in lawn-height turf, glufosinate at 1682 g ai ha-1 applied at 400 or 600 GDD32, glyphosate at 716 g ai ha-1 applied at 600 GDD32, and rimsulfuron + metsulfuron methyl at 38.8 g ai ha-1 applied at 600 GDD32 reduced zoysiagrass greenup to less than 40% compared to more than 70% greenup from all other treatments. Although trends between herbicides were generally consistent between sites, the fairway-height 'Meyer' zoysiagrass was generally less injured than the lawn-height mixture. Finale at 1682 g ai ha-1 applied at 400 and 600 GDD32 4 WAT had less green leaves per square decimeter than other treatments. Overall, glufosinate at 1628 g ai ha-1 was the most injurious treatment at all sites and all timings. Glyphosate did not injure zoysiagrass when applied at 200 or 400 GDD32 even though zoysiagrass green cover was 1 to 2.3% at the 400 GDD32 timing. All herbicides were safe to apply at 200 GDD32 and caused only transient zoysiagrass injury at most. At 400 GDD32, glyphosate, diquat, oxadiazon, foramsulfuron, and rimsulfuron + metsulfuron injured zoysiagrass less than 30% but glufosinate and flumioxazin injured zoysiagrass more than 30% and more than other treatments. Treatments applied at 600 GDD32 were more prone to cause injury and delay spring greenup for most herbicides." |
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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. 45
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Craft, J. M., J. R. Brewer, and S. Askew. 2017. Zoysiagrass response to herbicide during greenup. p. 66. 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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http://www.newss.org/wp-content/uploads/2017/07/2017-NEPPSC-Proceedings-FINAL.pdf#page=74
Last checked: 04/16/2018
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https://www.newss.org/wp-content/uploads/2017/07/2017-NEWSS-Proceedings-FINAL.pdf#page=73
Last checked: 01/23/2023
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Notes: Item is within a single large file |
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