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| Web URL(s): | http://www.swss.ws/wp-content/uploads/2021_SWSS_Proceedings_Final.pdf#page=156
Last checked: 06/24/2022
Requires: PDF Reader
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): | Cooper, C.;
Sellers, B. A. |
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| Author Affiliation: | Cooper: University of Florida, Lecanto, FL; Sellers: University of Florida, Ona, FL |
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| Title: | Assessing brunswickgrass response to timed hexazinone applications |
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| Section: | 2021 Meeting abstract
Other records with the "2021 Meeting abstract" Section
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| Meeting Info.: | January 25-26, 2021 |
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| Source: | Proceedings of the Southern Weed Science Society 74th Annual Meeting. Vol. 74, 2021, p. 57. |
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| Publishing Information: | Biloxi, MS: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Brunswickgrass (Paspalum nicorae Parodi), sometimes referred to as brown-seeded paspalum, is a problematic weed in summer perennial grass pastures in the southeast. In Florida we have seen increasing pressure to control this weed contaminate as it is becoming a major threat to livestock and bahiagrass seed industries. This rhizomatous grass is refused by cattle and seed could potentially restrict sales of contaminated bahiagrass seed lots. Currently, management options are limited; therefore, the objective of this research is to develop a management plan for Brunswickgrass in Bahiagrass seed production fields. Two experiments are currently underway with one being a continuation of a two-year titration study and the other focusing on application timing. Experiments were established within Citrus and Sumter in 2018 to address Brunswickgrass response to the application of hexazinone at 0.14, 0.28, 0.56, 0.84, and 1.12 kg ai ha-1. In 2019, an application timing study was established assessing control differences between month and rate. Applications were made monthly starting in May until September at rates of 0.56, 0.84, and 1.12 kg ai ha-1. In the titration study, hexazinone appears to have significant activity with all rates of hexazinone resulting in at least 44% control 30 days after treatment (DAT). Hexazinone at rates of at least 0.84 kg ha-1 resulted in at least 97% control 30 DAT. By 365 DAT there was no difference among treatments and control ranged from 0 to 60%; seedling recruitment is the likely cause of the increase in Brunswickgrass. A second application onto the same plots resulted in at least 80% Brunswickgrass control across all hexazinone rates, and rates of 0.28 kg ha-1 resulted in at least 93% control 30 DAT. By 365 DAT of the second hexazinone application, control ranged from 40 to 96% across all hexazinone treatments; only 1.12 kg ha-1 resulted in >90% control. There was no rate by month interaction at 30 or 365 DAT in the timing study, however, both month and rate were significant. Hexazinone at 0.56, 0.84, and 1.12 resulted in 81, 85, and 95% control at 30 DAT. Application of hexazinone in May resulted in the lowest level of control (63%), but all other application timings resulted in control of at least 86%. At 365 DAT, 0.56 kg ha-1 resulted in 56% control, and at least 74% control was achieved with the higher rates. Similar to 30 DAT, the May application timing resulted in the lowest level of control by 365 DAT (34%), whereas all other timings resulted in similar levels of control of at least 71%. Overall, these results are promising in the fact that we are seeing some initial success using hexazinone for Brunswickgrass management. However, it is evident that multiple annual applications may be necessary to deplete the soil seed bank. Also, applications should not be made prior to June for optimal activity." |
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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. 195, R=318201. R=318201 |
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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):
Cooper, C., and B. A. Sellers. 2021. Assessing brunswickgrass response to timed hexazinone applications. South. Weed Sci. Soc. Proc. 74:p. 57. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/2021_SWSS_Proceedings_Final.pdf#page=156
Last checked: 06/24/2022
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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