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| DOI: | 10.1017/wet.2020.49 |
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| Web URL(s): | https://bioone.org/journals/weed-technology/volume-35/issue-1/wet.2020.49/Antagonism-in-mixtures-of-glufosinate--glyphosate-and-glufosinate-/10.1017/wet.2020.49.full
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| Publication Type:
| Refereed |
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| Author(s): | Meyer, Chris J.;
Norsworthy, Jason K.;
Kruger, Greg R. |
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| Author Affiliation: | Meyer: Graduate Research Assistant, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR; Norsworthy: Professor and Elms Farming Chair of Weed Science, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR; Kruger: Associate Professor, Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE |
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| Title: | Antagonism in mixtures of glufosinate + glyphosate and glufosinate + clethodim on grasses |
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| Source: | Weed Technology. Vol. 35, No. 1, January/February 2021, p. 44551. |
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| Publishing Information: | Champaign, Illinois: Weed Science Society of America |
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| # of Pages: | 10 |
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| Keywords: | Author-Supplied Keywords: Herbicide interactions; Droplet size
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| Abstract/Contents: | "Proper management of glufosinate in glufosinate-resistant crop technologies is needed to mitigate the likelihood of resistance evolution. Antagonism may result from mixtures of glufosinate and other commonly used POST herbicides in soybean and cotton. Two experiments were conducted at the Arkansas Agricultural Research and Extension Center in Fayetteville, AR, in 2015 and 2016 to evaluate mixtures of glufosinate + clethodim and glufosinate + glyphosate on barnyardgrass, broadleaf signalgrass, johnsongrass, and large crabgrass. Furthermore, droplet spectra analyses were conducted to determine if droplet size was associated with identification of herbicide interactions. Antagonism was dependent on the herbicide rates and the weed species. For barnyardgrass and large crabgrass control 4 wk after treatment, glufosinate + glyphosate was antagonistic at all rates evaluated. When large crabgrass was evaluated, some mixtures (e.g., 595 g ha-1 glufosinate + 76 g ha-1 clethodim) had a significant reduction in control relative to one of the herbicides applied alone. Glufosinate (451 and 595 g ai ha-1) + glyphosate (867 and 1,735 g ae ha-1) was antagonistic at all four possible rate combinations for broadleaf signalgrass control. Fewer instances of antagonism were observed for seedling johnsongrass control than for other species, but certain treatments were identified as antagonistic (e.g., glufosinate at 451 g ai ha-1 + clethodim at 76 g ai ha-1). Overall, antagonism was less likely and greater control was observed when the highest rates of both herbicides in a given mixture were used. The addition of glyphosate or clethodim to glufosinate can increase the volume median diameter and decrease the percentage volume of fines, compared to glufosinate alone. The droplet spectra analyses indicate that the glufosinate performance may be negatively affected by the addition of glyphosate or clethodim." |
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| Language: | English |
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| References: | 41 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
2021. Antagonism in mixtures of glufosinate + glyphosate and glufosinate + clethodim on grasses. Weed Technol. 35(1):p. 44551. |
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| DOI: 10.1017/wet.2020.49 |
| Web URL(s):
https://bioone.org/journals/weed-technology/volume-35/issue-1/wet.2020.49/Antagonism-in-mixtures-of-glufosinate--glyphosate-and-glufosinate-/10.1017/wet.2020.49.full
Last checked: 05/07/2021
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Notes: Direct download |
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