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Hamberg RC, Yadav R, Dixon PM, Licht MA, Owen MD. Monitoring the temporal changes in herbicide-resistant Amaranthus tuberculatus: a landscape-scale probability-based estimation in Iowa. PEST MANAGEMENT SCIENCE 2023; 79:4819-4827. [PMID: 37498675 DOI: 10.1002/ps.7682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/19/2023] [Accepted: 07/27/2023] [Indexed: 07/29/2023]
Abstract
BACKGROUND A landscape-scale probability-based sampling of Iowa soybean [Glycine max (L.) Merr.] fields was conducted in 2013 and 2019; Amaranthus tuberculatus [Moq.] J.D. Sauer seed was collected from 97 random geospatial selected fields. The objectives were to evaluate the prevalence and distribution of herbicide-resistant A. tuberculatus (waterhemp) in soybean fields and evaluate temporal changes over 6 years. Amaranthus tuberculatus seedlings were evaluated for resistance to imazethapyr, atrazine, glyphosate, lactofen and mesotrione at 1× and 4× label rates. RESULTS Resistance to imazethapyr, glyphosate, lactofen and mesotrione at the 1× rate increased significantly from 2013 to 2019 and was found in 99%, 97%, 16% and 15% of Iowa A. tuberculatus populations in 2019, respectively. Resistance to atrazine at the 4× rate increased over time; atrazine resistance was found in 68% of populations in 2019. Three-way multiple herbicide-resistant A. tuberculatus was the most frequent and increased significantly to 4× rates from 16% in 2013 to 43% of populations in 2019. All A. tuberculatus populations resistant to HPPD-inhibitor herbicides also were resistant to atrazine. CONCLUSION To the best of our knowledge, this is the first probability-based study that presented evolution of A. tuberculatus herbicide resistance over time. The results demonstrated that imazethapyr, atrazine and glyphosate resistance in Iowa A. tuberculatus populations was frequent whereas resistance to lactofen and mesotrione was less frequent. Most Iowa A. tuberculatus populations evolved resistance to multiple sites of action over time. The results of our study are widely applicable given the similarities in weed management practices throughout the Midwest United States. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Ryan C Hamberg
- Department of Agronomy, Iowa State University, Ames, Iowa, USA
| | - Ramawatar Yadav
- Department of Agronomy, Iowa State University, Ames, Iowa, USA
| | - Philip M Dixon
- Department of Statistics, Iowa State University, Ames, Iowa, USA
| | - Mark A Licht
- Department of Agronomy, Iowa State University, Ames, Iowa, USA
| | - Micheal Dk Owen
- Department of Agronomy, Iowa State University, Ames, Iowa, USA
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Selby TP, Satterfield AD, Puri A, Stevenson TM, Travis DA, Campbell MJ, Taggi AE, Hughes KA, Bereznak J. Bioisosteric Tactics in the Discovery of Tetflupyrolimet: A New Mode-of-Action Herbicide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:18197-18204. [PMID: 37285594 DOI: 10.1021/acs.jafc.3c01634] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The last new herbicidal modes-of-action with commercial significance were introduced to the marketplace multiple decades ago. Serious weed resistance to most herbicidal classes have since emerged with widespread use. Aryl pyrrolidinone anilides represent an entirely new mode-of-action class of herbicides that interfere with de novo pyrimidine biosynthesis in plants via inhibition of dihydroorotate dehydrogenase. The chemical lead for this new herbicide class discovery was identified from high-volume sourced greenhouse screening that required structural reassignment of the hit molecule followed by an extensive synthetic optimization effort. With excellent grass weed control and pronounced safety on rice, the selected commercial development candidate has a proposed common name of tetflupyrolimet and represents the first member of the new HRAC (Herbicide Resistance Action Committee) Group 28. This paper describes the discovery path to tetflupyrolimet with an added focus on the bioisosteric modifications pursued in optimization, including replacements of the lactam core itself.
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Affiliation(s)
- Thomas P Selby
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
| | - Andrew D Satterfield
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
| | - Atul Puri
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
| | - Thomas M Stevenson
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
| | - D Andrew Travis
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
| | - Matthew J Campbell
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
| | - Andrew E Taggi
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
| | - Kenneth A Hughes
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
| | - James Bereznak
- FMC Corporation, Stine Research Center, 1090 Elkton Road, Newark, Delaware 19711, USA
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Maderthaner M, Weber M, Takács E, Mörtl M, Leisch F, Römbke J, Querner P, Walcher R, Gruber E, Székács A, Zaller JG. Commercial glyphosate-based herbicides effects on springtails (Collembola) differ from those of their respective active ingredients and vary with soil organic matter content. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:17280-17289. [PMID: 32152864 PMCID: PMC7192858 DOI: 10.1007/s11356-020-08213-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 02/24/2020] [Indexed: 04/15/2023]
Abstract
Glyphosate-based herbicides (GBH) are currently the most widely used agrochemicals for weed control. Environmental risk assessments (ERA) on nontarget organisms mostly consider the active ingredients (AIs) of these herbicides, while much less is known on effects of commercial GBH formulations that are actually applied in the field. Moreover, it is largely unknown to what extent different soil characteristics alter potential side effects of herbicides. We conducted a greenhouse experiment growing a model weed population of Amaranthus retroflexus in arable field soil with either 3.0 or 4.1% soil organic matter (SOM) content and treated these weeds either with GBHs (Roundup LB Plus, Touchdown Quattro, Roundup PowerFlex) or their respective AIs (isopropylammonium, diammonium or potassium salts of glyphosate) at recommended dosages. Control pots were mechanically weeded. Nontarget effects were assessed on the surface activity of the springtail species Sminthurinus niger (pitfall trapping) and litter decomposition in the soil (teabag approach). Both GBHs and AIs increased the surface activity of springtails compared to control pots; springtail activity was higher under GBHs than under corresponding AIs. Stimulation of springtail activity was much higher in soil with higher SOM content than with low SOM content (significant treatment x SOM interaction). Litter decomposition was unaffected by GBHs, AIs or SOM levels. We suggest that ERAs for pesticides should be performed with actually applied herbicides rather than only on AIs and should also consider influences of different soil properties.
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Affiliation(s)
- Michael Maderthaner
- Institute of Zoology, University of Natural Resources and Life Sciences Vienna (BOKU), Gregor Mendel Straße 33, A-1180, Vienna, Austria
| | - Maureen Weber
- Institute of Zoology, University of Natural Resources and Life Sciences Vienna (BOKU), Gregor Mendel Straße 33, A-1180, Vienna, Austria
| | - Eszter Takács
- Agro-Environmental Research Institute, National Agricultural Research and Innovation Centre, Herman O. u. 15, Budapest, H-1022, Hungary
| | - Mária Mörtl
- Agro-Environmental Research Institute, National Agricultural Research and Innovation Centre, Herman O. u. 15, Budapest, H-1022, Hungary
| | - Friedrich Leisch
- Institute of Statistics, University of Natural Resources and Life Sciences Vienna (BOKU), Peter-Jordan-Straße 82, A-1190, Vienna, Austria
| | - Jörg Römbke
- ECT Oekotoxikologie GmbH, Böttgerstraße 2, 65439, Flörsheim, Germany
| | - Pascal Querner
- Institute of Zoology, University of Natural Resources and Life Sciences Vienna (BOKU), Gregor Mendel Straße 33, A-1180, Vienna, Austria
| | - Ronnie Walcher
- Institute of Zoology, University of Natural Resources and Life Sciences Vienna (BOKU), Gregor Mendel Straße 33, A-1180, Vienna, Austria
| | - Edith Gruber
- Institute of Zoology, University of Natural Resources and Life Sciences Vienna (BOKU), Gregor Mendel Straße 33, A-1180, Vienna, Austria
| | - András Székács
- Agro-Environmental Research Institute, National Agricultural Research and Innovation Centre, Herman O. u. 15, Budapest, H-1022, Hungary
| | - Johann G Zaller
- Institute of Zoology, University of Natural Resources and Life Sciences Vienna (BOKU), Gregor Mendel Straße 33, A-1180, Vienna, Austria.
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Vieira BC, Luck JD, Amundsen KL, Werle R, Gaines TA, Kruger GR. Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp. Sci Rep 2020; 10:2146. [PMID: 32034222 PMCID: PMC7005892 DOI: 10.1038/s41598-020-59126-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 01/22/2020] [Indexed: 12/22/2022] Open
Abstract
While the introduction of herbicide tolerant crops provided growers new options to manage weeds, the widespread adoption of these herbicides increased the risk for herbicide spray drift to surrounding vegetation. The impact of herbicide drift in sensitive crops is extensively investigated, whereas scarce information is available on the consequences of herbicide drift in non-target plants. Weeds are often abundant in field margins and ditches surrounding agricultural landscapes. Repeated herbicide drift exposure to weeds could be detrimental to long-term management as numerous weeds evolved herbicide resistance following recurrent-selection with low herbicide rates. The objective of this study was to evaluate if glyphosate, 2,4-D, and dicamba spray drift could select Amaranthus spp. biotypes with reduced herbicide sensitivity. Palmer amaranth and waterhemp populations were recurrently exposed to herbicide drift in a wind tunnel study over two generations. Seeds from survival plants were used for the subsequent rounds of herbicide drift exposure. Progenies were subjected to herbicide dose-response studies following drift selection. Herbicide drift exposure rapidly selected for Amaranthus spp. biotypes with reduced herbicide sensitivity over two generations. Weed management programs should consider strategies to mitigate near-field spray drift and suppress the establishment of resistance-prone weeds on field borders and ditches in agricultural landscapes.
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Affiliation(s)
- Bruno C Vieira
- West Central Research and Extension Center, University of Nebraska-Lincoln, North Platte, NE, USA.
| | - Joe D Luck
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Keenan L Amundsen
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Rodrigo Werle
- Department of Agronomy, University of Wisconsin-Madison, Madison, WI, USA
| | - Todd A Gaines
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Greg R Kruger
- West Central Research and Extension Center, University of Nebraska-Lincoln, North Platte, NE, USA
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Vieira BC, Luck JD, Amundsen KL, Gaines TA, Werle R, Kruger GR. Response of Amaranthus spp. following exposure to sublethal herbicide rates via spray particle drift. PLoS One 2019; 14:e0220014. [PMID: 31318947 PMCID: PMC6638980 DOI: 10.1371/journal.pone.0220014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/05/2019] [Indexed: 01/29/2023] Open
Abstract
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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Affiliation(s)
- Bruno C. Vieira
- West Central Research and Extension Center, University of Nebraska-Lincoln, North Platte, NE, United States of America
| | - Joe D. Luck
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, United States of America
| | - Keenan L. Amundsen
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, United States of America
| | - Todd A. Gaines
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, United States of America
| | - Rodrigo Werle
- Department of Agronomy, University of Wisconsin–Madison, Madison, WI, United States of America
| | - Greg R. Kruger
- West Central Research and Extension Center, University of Nebraska-Lincoln, North Platte, NE, United States of America
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Gaines TA, Shaner DL, Dayan FE. Introduction to Pest Management Science special issue for GHRC 2017. PEST MANAGEMENT SCIENCE 2018; 74:2209-2210. [PMID: 30203449 DOI: 10.1002/ps.5128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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