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| DOI: | 10.1017/wsc.2019.45 |
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| Web URL(s): | https://bioone.org/journals/Weed-Science/volume-67/issue-6/wsc.2019.45/The-Influence-of-Winter-Annual-Grass-Litter-on-Herbicide-Availability/10.1017/wsc.2019.45.full
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| Publication Type:
| Refereed |
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| Author(s): | Clark, Shannon L.;
da Silva, Paulo V.;
Dayan, Franck E.;
Nissen, Scott J.;
Sebastian, Derek J. |
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| Author Affiliation: | Clark: Graduate Research Assistant, Bioagricultural Sciences and Pest Management Department, Colorado State University, Fort Collins, CO; da Silva: Graduate Student, Department of Plant Production, University of São Paulo, School of Agriculture 'Luiz de Queiroz', Piracicaba, SP, Brazil; Dayan and Nissen: Professor, Bioagricultural Sciences and Pest Management Department, Colorado State University, Fort Collins, CO; Sebastian: Area Sales Manager, Bayer Vegetation Management, Bayer U.S., Cary, NC |
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| Title: | The influence of winter annual grass litter on herbicide availability |
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| Source: | Weed Science. Vol. 67, No. 6, December 2019, p. 702-709. |
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| Publishing Information: | Champaign, Illinois: Weed Science Society of America |
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| # of Pages: | 8 |
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| Related Web URL: | https://www.researchgate.net/publication/335367687_The_Influence_of_Winter_Annual_Grass_Litter_on_Herbicide_Availability
Last checked: 01/14/2020
Notes: Abstract only |
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| Keywords: | TIC Keywords: Bromus tectorum; Herbicide application; Herbicide concentrations; Herbicide degradation; Herbicide evaluation; Imazapic; Indaziflam; Rainfall simulators; Rimsulfuron; Taeniatherum caput-medusae; Ventenata dubia; Winter annuals; Yard waste
Author-Supplied Keywords: Desorption; Downy brome; Imazapic; Indaziflam; Interception; Medusahead; Rimsulfuron; Ventenata
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| Abstract/Contents: | "Invasive winter annual grass infestations on rangeland accumulate large quantities of litter on the soil surface, as plants senesce yearly and decompose slowly. It has been speculated that winter annual grass litter can adsorb soil-active herbicides and reduce overall performance. Three experiments were conducted from 2017 to 2018 at the Colorado State University Weed Research Laboratory to evaluate interception and subsequent desorption of herbicides applied to litter from three invasive winter annual grass species with simulated rainfall. Imazapic, rimsulfuron, and indaziflam were applied to medusahead [Taeniatherum caput-medusae (L.) Nevski], ventenata [Ventenata dubia (Leers) Coss.], and downy brome (Bromus tectorum L.) litter at two amounts (equivalent to 1,300 and 2,600 kg ha-1). Rainfall was simulated at 3, 6, 12, and 24 mm at 0, 1, and 7 d after herbicide application. Herbicide concentration from the collected rainfall was measured using liquid chromatographytandem mass spectrometry. At 2,600 kg ha-1, B. tectorum herbicide interception was 84.3%, while V. dubia and T. caput-medusae averaged 76% herbicide interception. There were no differences in desorption among the three litter types. Simulated rainfall at 0 d after application recovered 100% of the intercepted rimsulfuron and imazapic from B. tectorum litter, while recovery decreased to 65% with rainfall at 1 or 7 d after application. Only 54% of indaziflam could be recovered at 0 d, and recovery decreased to 33% when rainfall was applied at 1 or 7 d after application. Applying soil-active herbicides before forecasted rain or tank mixing with a POST herbicide to provide initial control could potentially increase the amount of herbicide reaching the soil and provide more consistent invasive winter annual grass control." |
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| Language: | English |
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| References: | 59 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Clark, S. L., P. V. da Silva, F. E. Dayan, S. J. Nissen, and D. J. Sebastian. 2019. The influence of winter annual grass litter on herbicide availability. Weed Sci. 67(6):p. 702-709. |
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| DOI: 10.1017/wsc.2019.45 |
| Web URL(s):
https://bioone.org/journals/Weed-Science/volume-67/issue-6/wsc.2019.45/The-Influence-of-Winter-Annual-Grass-Litter-on-Herbicide-Availability/10.1017/wsc.2019.45.full
Last checked: 01/14/2020
Access conditions: Item is within a limited-access website
https://bioone.org/journalArticle/Download?fullDOI=10.1017%2Fwsc.2019.45
Last checked: 01/14/2020
Requires: PDF Reader
Access conditions: Item is within a limited-access website
Notes: Direct download |
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