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Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift

The adverse consequences of herbicide drift towards sensitive crops have been extensively reported in the literature. However, little to no information is available on the consequences of herbicide drift onto weed species inhabiting boundaries of agricultural fields. Exposure to herbicide drift coul...

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Autores principales: Vieira, Bruno C., Luck, Joe D., Amundsen, Keenan L., Gaines, Todd A., Werle, Rodrigo, Kruger, Greg R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6638980/
https://www.ncbi.nlm.nih.gov/pubmed/31318947
http://dx.doi.org/10.1371/journal.pone.0220014
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author Vieira, Bruno C.
Luck, Joe D.
Amundsen, Keenan L.
Gaines, Todd A.
Werle, Rodrigo
Kruger, Greg R.
author_facet Vieira, Bruno C.
Luck, Joe D.
Amundsen, Keenan L.
Gaines, Todd A.
Werle, Rodrigo
Kruger, Greg R.
author_sort Vieira, Bruno C.
collection PubMed
description The adverse consequences of herbicide drift towards sensitive crops have been extensively reported in the literature. However, little to no information is available on the consequences of herbicide drift onto weed species inhabiting boundaries of agricultural fields. Exposure to herbicide drift could be detrimental to long-term weed management as several weed species have evolved herbicide-resistance after recurrent selection with sublethal herbicide rates This study investigated the deposition of glyphosate, 2,4-D, and dicamba spray particle drift from applications with two different nozzles in a low speed wind tunnel, and their impact on growth and development of Amaranthus spp. Herbicide drift resulted in biomass reduction or complete plant mortality. Inflection points (distance to 50% biomass reduction) for Amaranthus tuberculatus were 7.7, 4.0, and 4.1 m downwind distance for glyphosate, 2,4-D, and dicamba applications with the flat-fan nozzle, respectively, whereas these values corresponded to 2.8, 2.5, and 1.9 m for applications with the air-inclusion nozzle. Inflection points for Amaranthus palmeri biomass reduction were 16.3, 10.9, and 11.5 m for glyphosate, 2,4-D, and dicamba applications with the flat-fan nozzle, respectively, whereas these values corresponded to 7.6, 5.4, and 5.4 m for applications with the air-inclusion nozzle. Plants were more sensitive to glyphosate at higher exposure rates than other herbicides, whereas plants were more sensitive to 2,4-D and dicamba at lower exposure rates compared to glyphosate. Applications with the flat-fan nozzle resulted in 32.3 and 11.5% drift of the applied rate at 1.0 and 3.0 m downwind, respectively, whereas the air-inclusion nozzle decreased the dose exposure in the same distances (11.4 and 2.7%, respectively). Herbicide drift towards field boundaries was influenced by nozzle design and exposed weeds to herbicide rates previously reported to select for herbicide-resistant biotypes.
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spelling pubmed-66389802019-07-25 Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift Vieira, Bruno C. Luck, Joe D. Amundsen, Keenan L. Gaines, Todd A. Werle, Rodrigo Kruger, Greg R. PLoS One Research Article The adverse consequences of herbicide drift towards sensitive crops have been extensively reported in the literature. However, little to no information is available on the consequences of herbicide drift onto weed species inhabiting boundaries of agricultural fields. Exposure to herbicide drift could be detrimental to long-term weed management as several weed species have evolved herbicide-resistance after recurrent selection with sublethal herbicide rates This study investigated the deposition of glyphosate, 2,4-D, and dicamba spray particle drift from applications with two different nozzles in a low speed wind tunnel, and their impact on growth and development of Amaranthus spp. Herbicide drift resulted in biomass reduction or complete plant mortality. Inflection points (distance to 50% biomass reduction) for Amaranthus tuberculatus were 7.7, 4.0, and 4.1 m downwind distance for glyphosate, 2,4-D, and dicamba applications with the flat-fan nozzle, respectively, whereas these values corresponded to 2.8, 2.5, and 1.9 m for applications with the air-inclusion nozzle. Inflection points for Amaranthus palmeri biomass reduction were 16.3, 10.9, and 11.5 m for glyphosate, 2,4-D, and dicamba applications with the flat-fan nozzle, respectively, whereas these values corresponded to 7.6, 5.4, and 5.4 m for applications with the air-inclusion nozzle. Plants were more sensitive to glyphosate at higher exposure rates than other herbicides, whereas plants were more sensitive to 2,4-D and dicamba at lower exposure rates compared to glyphosate. Applications with the flat-fan nozzle resulted in 32.3 and 11.5% drift of the applied rate at 1.0 and 3.0 m downwind, respectively, whereas the air-inclusion nozzle decreased the dose exposure in the same distances (11.4 and 2.7%, respectively). Herbicide drift towards field boundaries was influenced by nozzle design and exposed weeds to herbicide rates previously reported to select for herbicide-resistant biotypes. Public Library of Science 2019-07-18 /pmc/articles/PMC6638980/ /pubmed/31318947 http://dx.doi.org/10.1371/journal.pone.0220014 Text en © 2019 Vieira et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Vieira, Bruno C.
Luck, Joe D.
Amundsen, Keenan L.
Gaines, Todd A.
Werle, Rodrigo
Kruger, Greg R.
Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift
title Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift
title_full Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift
title_fullStr Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift
title_full_unstemmed Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift
title_short Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift
title_sort response of amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6638980/
https://www.ncbi.nlm.nih.gov/pubmed/31318947
http://dx.doi.org/10.1371/journal.pone.0220014
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