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| Web URL(s): | https://neppsc.org/wp-content/uploads/2019-NEPPSC-Proceedings-FINAL.pdf#page=72
Last checked: 07/19/2019
Requires: PDF Reader
Notes: Item is within a single large file
https://www.newss.org/wp-content/uploads/2019-NEWSS-Proceedings-FINAL.pdf#page=67
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file; Proceedings of the Seventy-third Annual Meeting of the Northeastern Weed Science Society reprint |
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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.;
Askew, S. D. |
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| Author Affiliation: | Virginia Tech, Blacksburg, VA |
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| Title: | Sod removal spot treatment, and selective herbicides for roughstalk bluegrass control in cool-season turf |
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| Meeting Info.: | Hunt Valley, Maryland: January 8-10, 2019 |
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| Source: | Proceedings of the Fourth Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. Vol. 4, 2019, p. 62. |
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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: Amicarbazone; Glyphosate; Herbicide application; Herbicide combinations; Herbicide program; Mesotrione; Poa trivialis; Primisulfuron; Sod removal; Weed control
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| Abstract/Contents: | "In cool-season turfgrass systems in Virginia, roughstalk bluegrass (Poa trivialis) is one of the most prevalent and troublesome perennial grasses to manage on a year to year basis. Most of the herbicide options available to turf managers are inconsistent and/or ineffective. There is a need for an effective long-term chemical or mechanical option to control Poa trivialis. In published literature so far researchers have evaluated a range of herbicides including amicarbazone, bispyribac-sodium, glyphosate, methiozolin and sulfosulfuron with most of the research focusing on bispyribac-sodium and sulfosulfuron. Unfortunately, most of the research regarding the aforementioned herbicides have only been focused on immediate control, and only a few studies have been published to evaluate long-term Poa trivialis control. Researchers have observed bispyribac-sodium and sulfosulfuron controlling Poa trivialis greater than 80% by 8 to 12 weeks after the initial application, but very few have reported on the long-term impact of these two herbicides. Researchers in Georgia did evaluate herbicides for long-term Poa trivialis control. They found that even though bispyribac-sodium and sulfosulfuron controlled Poa trivialis effectively early in the study; Poa trivialis mostly recovered by the following fall or spring. Researchers have also observed glyphosate significantly reducing Poa trivialis cover one year after application. Interseeding desired turfgrass in combination with these nonselective and selective herbicide options have been shown to improve long-term Poa trivialis control compared to non-seeded programs. At Virginia Tech, research showed that methiozolin applied for two years can effectively reduce Poa trivialis populations by more than 80% one year after last treatment (YALT). Unfortunately, methiozolin is not yet labeled in the United States. The same study also showed that bispyribac-sodium can reduce populations between 40 and 60%, but with unacceptable injury to creeping bentgrass. In recent years at Virginia Tech, research was focused on utilizing different rates and sequential applications of primisulfuron for selective Poa trivialis control. One recent study evaluated primisulfuron with 18 different herbicide combinations, but no significant long-term control was observed. This past spring at Virginia Tech a new study was initiated to focus on integrating herbicide programs with seeding perennial ryegrass at 390 kg ha-1 . The study was developed as a randomized complete block design with four replications. The treatments included amicarbazone at 105 g ha-1, amicarbazone plus mesotrione at 175 g ha-1 , glyphosate applied as a spot treatment at 10% V/V solution, glyphosate applied as a renovation treatment at 7 kg ha-1 , mechanical sod removal and replacement, and primisulfuron at 39 g ha-1 . Amicarbazone, amicarbazone plus mesotrione, and primisulfuron were applied twice at a two week interval. All herbicide treatments were applied with CO2- powered backpack sprayer that was calibrated to spray 374 L ha-1 and fitted with four TTI 11006 nozzles. By the final spring 2018 rating, amicarbazone plus mesotrione, glyphosate spot treatment, glyphosate renovation, and the sod replacement controlled Poa trivialis 86, 92, 100, and 100%, respectively. Primisulfuron had only controlled Poa trivialis 66% by this time. The evaluation in spring 2019 is the most important rating for the study to determine if any programs had effective year-long control. We hypothesize that the added turf competition from seeding and sodding will increase the long-term suppression of Poa trivialis. The sod replacement treatment was added to determine if a nonchemical treatment could be a viable option for homeowners." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
Reprint appears in Proceedings of the Seventy-third Annual Meeting of the Northeastern Weed Science Society 2019, Vol. 73, p. 42 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brewer, J., and S. D. Askew. 2019. Sod removal spot treatment, and selective herbicides for roughstalk bluegrass control in cool-season turf. p. 62. In Proceedings of the Fourth Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. Hunt Valley, Maryland: January 8-10, 2019. 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):
https://neppsc.org/wp-content/uploads/2019-NEPPSC-Proceedings-FINAL.pdf#page=72
Last checked: 07/19/2019
Requires: PDF Reader
Notes: Item is within a single large file
https://www.newss.org/wp-content/uploads/2019-NEWSS-Proceedings-FINAL.pdf#page=67
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file; Proceedings of the Seventy-third Annual Meeting of the Northeastern Weed Science Society reprint |
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