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| Web URL(s): | https://wssa.net/wp-content/uploads/WSSA-Virtual-Annual-Meeting-all-abstracts-updated-4-12-2021ab_FINAL.pdf#page=83
Last checked: 06/23/2023
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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): | Wilber, Amy L.;
McCurdy, James D.;
Czarnecki, Joby;
Stewart, Barry;
Dong, Hongxu |
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| Author Affiliation: | Wilber, Czarnecki, Stewart, and Dong: Mississippi State University, Mississippi State, MS; McCurdy: Mississippi State Universityk, Starkville, MS |
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| Title: | Assessing St. Augustinegrass (Stenotaphrum secundatum) grow-in following preemergence herbicide application |
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| Section: | MS poster contest
Other records with the "MS poster contest" Section
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| Meeting Info.: | February 15-19, 2021 |
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| Source: | Abstracts of the Annual Meeting of the Weed Science Society of America. 2021, p. 83. |
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| Publishing Information: | [United States]: Weed Science Society of America |
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| # of Pages: | 1 |
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| Abstract/Contents: | "St. Augustinegrass (Stenotaphrum secundatum) is a commonly produced lawn grass in the southeastern and gulf-coastal United States. Producers routinely apply preemergence herbicides to prevent annual weed infestation in turfgrass production fields. Preemergence herbicides may negatively affect grow-in of the desired turfgrass species. Our objective was to assess St. Augustinegrass grow-in following application of commonly used preemergence herbicides. Field research was conducted at Mississippi State University as a randomized complete block design with four replications replicated twice in time (2019 and 2020). Ten plugs (232 cm2 apiece) of MS-B-2-3-98 St. Augustinegrass were planted within each experimental unit (2.32 m2) on 12 June 2019 and 14 May 2020. One day after planting, preemergence herbicide treatments were applied using a CO2 pressurized back-pack sprayer in a water carrier volume of 374 L ha-1 . Treatments included a nontreated check, prodiamine (0.595 kg ai ha-1), pendimethalin (1.66 kg ha-1), oxadiazon (2.24 kg ha-1), S-metolachlor (2.78 kg ha-1), atrazine (2.24 kg ha-1), atrazine + S-metolachlor (2.24 + 1.74 kg ha-1), and dithiopyr (0.42 kg ha-1), as well as the treated-check, indaziflam (0.0327 kg ha-1). Irrigation was applied four hours after treatment. Percentage St. Augustinegrass cover was assessed weekly. Data were regressed using a sigmoidal, variable slope curve to estimate days to reach 50% cover (Days50) with 95% confidence intervals within GraphPad Prism 9. Extra sum-of-squares F-tests were conducted using GraphPad Prism 9 to compare the fit of regression curves. In 2019, prodiamine (107d to reach 50% cover;), pendimethalin (94d), oxadiazon G (88d), S-metolachlor (89d), atrazine + S-metolachlor (90d), dithiopyr (93d), and indaziflam (357d) increased Days50 compared to the nontreated (84d). In 2020, prodiamine (61d), S-metolachlor (65d), dithiopyr (59d), and indaziflam (96d) increased Days50 compared to the nontreated (55d). Prodiamine, S-metolachlor, dithiopyr, and indaziflam treatments increased days to reach 50% cover in both 2019 and 2020. In 2019, regression curves of oxadiazon WSP and atrazine were similar to the curve of the nontreated. In 2020, regression curves of pendimethalin, oxadiazon WSP, atrazine, and atrazine + S-metolachlor were similar to the curve of the nontreated. Producers must consider their target weeds along with the impact on sod grow-in when making preemergence herbicide applications. Based on 2019 and 2020 results, atrazine or oxadiazon WSP can be recommended (at rates applied in this study) for preemergence weed control in St. Augustinegrass without affecting time to grow-in. Despite prodiamine, S-metolachlor, and dithiopyr delaying cover in both years, future research may better determine whether benefits of weed control outweigh delayed cover" |
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| Language: | English |
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| References: | 0 |
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| See Also: | Original version appears in Proceedings of the Southern Weed Science Society 73rd Annual Meeting, Vol. 73 2020, p. 131 with variant title "Evaluating St. Augustinegrass (Stenotaphrum secundatum) grow-in following preemergence herbicide application using multispectral imaging", R=318186. R=318186 |
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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):
Wilber, A. L., J. D. McCurdy, J. Czarnecki, B. Stewart, and H. Dong. 2021. Assessing St. Augustinegrass (Stenotaphrum secundatum) grow-in following preemergence herbicide application. Abstr. Annu. Meet. Weed Sci. Soc. Am. p. 83. |
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| Web URL(s):
https://wssa.net/wp-content/uploads/WSSA-Virtual-Annual-Meeting-all-abstracts-updated-4-12-2021ab_FINAL.pdf#page=83
Last checked: 06/23/2023
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2180085 |
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