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González‐Torralva F, Norsworthy JK. Target-site mutations Ile1781Leu and Ile2041Asn in the ACCase2 gene confer resistance to fluazifop-p-butyl and pinoxaden herbicides in a johnsongrass accession from Arkansas, USA. Plant Direct 2024; 8:e576. [PMID: 38516339 PMCID: PMC10955616 DOI: 10.1002/pld3.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 02/18/2024] [Accepted: 02/22/2024] [Indexed: 03/23/2024]
Abstract
Johnsongrass [Sorghum halepense (L.) Pers.] is a troublesome weed species in different agricultural and non-agricultural areas. Because of its biology, reproductive system, and seed production, effective management is challenging. An accession with low susceptibility to the acetyl-CoA carboxylase (ACCase)-inhibiting herbicides fluazifop-p-butyl (fluazifop) and pinoxaden was collected in eastern Arkansas. In this research, the molecular mechanisms responsible for ACCase resistance were investigated. Dose-response experiments showed a resistance factor of 181 and 133 for fluazifop and pinoxaden, respectively. Molecular analysis of both ACCase1 and ACCase2 genes was researched. Nucleotide comparison of ACCase1 between resistant and susceptible accessions showed no single nucleotide polymorphisms. Nonetheless, analysis of ACCase2 in fluazifop-resistant johnsongrass plants revealed the Ile1781Leu target-site mutation was dominant (nearly 75%), whereas the majority of pinoxaden-resistant johnsongrass plants had the Ile2041Asn (60%). Not all sequenced johnsongrass plants displayed a target-site mutation, suggesting the presence of additional resistance mechanisms. Amplification of ACCase1 and ACCase2 was not responsible for resistance because of the similar values obtained in both resistant and susceptible accessions. Experiments with malathion and NBD-Cl suggest the presence of herbicide metabolism. Outcomes of this research demonstrated that fluazifop- and pinoxaden-resistant johnsongrass plants displayed a target-site mutation in ACCase2, but also that non-target-site resistance mechanisms would be involved and require a detailed study.
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Affiliation(s)
| | - Jason K. Norsworthy
- Department of Crop, Soil, and Environmental SciencesUniversity of ArkansasFayettevilleARUSA
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2
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Huddell AM, Thapa R, Marcillo GS, Abendroth LJ, Ackroyd VJ, Armstrong SD, Asmita G, Bagavathiannan MV, Balkcom KS, Basche A, Beam S, Bradley K, Canisares LP, Darby H, Davis AS, Devkota P, Dick WA, Evans JA, Everman WJ, de Almeida TF, Flessner ML, Fultz LM, Gailans S, Hashemi M, Haymaker J, Helmers MJ, Jordan N, Kaspar TC, Ketterings QM, Kladivko E, Kravchenko A, Law EP, Lazaro L, Leon RG, Liebert J, Lindquist J, Loria K, McVane JM, Miller JO, Mulvaney MJ, Nkongolo NV, Norsworthy JK, Parajuli B, Pelzer C, Peterson C, Poffenbarger H, Poudel P, Reiter MS, Ruark M, Ryan MR, Samuelson S, Sawyer JE, Seehaver S, Shergill LS, Upadhyaya YR, VanGessel M, Waggoner AL, Wallace JM, Wells S, White C, Wolters B, Woodley A, Ye R, Youngerman E, Needelman BA, Mirsky SB. U.S. cereal rye winter cover crop growth database. Sci Data 2024; 11:200. [PMID: 38351049 PMCID: PMC10864324 DOI: 10.1038/s41597-024-02996-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 01/25/2024] [Indexed: 02/16/2024] Open
Abstract
Winter cover crop performance metrics (i.e., vegetative biomass quantity and quality) affect ecosystem services provisions, but they vary widely due to differences in agronomic practices, soil properties, and climate. Cereal rye (Secale cereale) is the most common winter cover crop in the United States due to its winter hardiness, low seed cost, and high biomass production. We compiled data on cereal rye winter cover crop performance metrics, agronomic practices, and soil properties across the eastern half of the United States. The dataset includes a total of 5,695 cereal rye biomass observations across 208 site-years between 2001-2022 and encompasses a wide range of agronomic, soils, and climate conditions. Cereal rye biomass values had a mean of 3,428 kg ha-1, a median of 2,458 kg ha-1, and a standard deviation of 3,163 kg ha-1. The data can be used for empirical analyses, to calibrate, validate, and evaluate process-based models, and to develop decision support tools for management and policy decisions.
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Affiliation(s)
- Alexandra M Huddell
- Department of Environmental Science & Technology, University of Maryland, College Park, MD, USA.
- Department of Plant and Soil Sciences, University of Delaware, Newark, DE, USA.
| | - Resham Thapa
- Department of Agricultural and Environmental Sciences, Tennessee State University, Nashville, TN, USA
| | | | - Lori J Abendroth
- USDA-ARS, Cropping Systems and Water Quality Research Unit, Columbia, MO, USA
| | - Victoria J Ackroyd
- Department of Plant Science & Landscape Architecture, University of Maryland, College Park, MD, USA
| | | | - Gautam Asmita
- Department of Agronomy, Purdue University, West Lafayette, IN, USA
| | | | | | - Andrea Basche
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Shawn Beam
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, USA
| | | | | | - Heather Darby
- University of Vermont Extension, St. Albans, VT, USA
| | - Adam S Davis
- USDA-ARS, Global Change and Photosynthesis Research Unit, Urbana, IL, USA
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Pratap Devkota
- West Florida Research and Education Center, University of Florida, Institute of Food and Agricultural Sciences, Jay, FL, USA
| | - Warren A Dick
- School of Environment and Resources, Ohio State University, Wooster, OH, USA
| | | | - Wesley J Everman
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, USA
| | | | - Michael L Flessner
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Lisa M Fultz
- School of Plant, Environmental and Soil Sciences, Louisiana State University AgCenter, Baton Rouge, LA, USA
| | | | - Masoud Hashemi
- Stockbridge School of Agriculture, University of Massachusetts Amherst, Amherst, MA, USA
| | - Joseph Haymaker
- Eastern Shore Agricultural Research and Extension Center, Virginia Tech, Painter, VA, USA
| | - Matthew J Helmers
- Iowa Nutrient Research Center, Department of Agriculture and Biosystems Engineering, Iowa State University, Ames, IA, USA
| | - Nicholas Jordan
- Agronomy and Plant Genetics Department, University of Minnesota, St. Paul, MN, USA
| | - Thomas C Kaspar
- USDA-ARS, National Laboratory for Agriculture and the Environment, Ames, IA, USA
| | - Quirine M Ketterings
- Nutrient Management Spear Program, Department of Animal Science, Cornell University, Ithaca, NY, USA
| | - Eileen Kladivko
- Department of Agronomy, Purdue University, West Lafayette, IN, USA
| | - Alexandra Kravchenko
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Eugene P Law
- Department of Plant and Soil Sciences, University of Delaware, Newark, DE, USA
| | - Lauren Lazaro
- Blue River Technology, and Lousiana State University AgCenter, Baton Rouge, LA, USA
| | - Ramon G Leon
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, USA
| | - Jeffrey Liebert
- Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, US
- Department of Natural Resource Sciences, McGill University, Montreal, Quebec, Canada
| | - John Lindquist
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Kristen Loria
- Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, US
| | - Jodie M McVane
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, USA
| | - Jarrod O Miller
- Carvel Research and Education Center, University of Delaware, Georgetown, DE, USA
| | - Michael J Mulvaney
- Department of Plant & Soil Sciences, Mississippi State University, Starkville, MS, USA
| | | | - Jason K Norsworthy
- University of Arkansas Systems Division of Agriculture, Little Rock, Arkansas, USA
| | - Binaya Parajuli
- Department of Plant & Environmental Sciences, Clemson University, Florence, SC, USA
| | - Christopher Pelzer
- Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, US
| | - Cara Peterson
- Department of Plant Science & Landscape Architecture, University of Maryland, College Park, MD, USA
| | - Hanna Poffenbarger
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, USA
| | - Pratima Poudel
- Department of Plant & Environmental Sciences, Clemson University, Florence, SC, USA
| | - Mark S Reiter
- Eastern Shore Agricultural Research and Extension Center, Virginia Tech, Painter, VA, USA
| | - Matt Ruark
- Department of Soil Science, University of Wisconsin-Madison, Madison, WI, USA
| | - Matthew R Ryan
- Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, US
| | - Spencer Samuelson
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, USA
| | - John E Sawyer
- Department of Agronomy, Iowa State University, Ames, IA, USA
| | - Sarah Seehaver
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, USA
| | | | - Yogendra Raj Upadhyaya
- West Florida Research and Education Center, University of Florida, Institute of Food and Agricultural Sciences, Jay, FL, USA
| | - Mark VanGessel
- Carvel Research and Education Center, University of Delaware, Georgetown, DE, USA
| | - Ashley L Waggoner
- Department of Soil Science, University of Wisconsin-Madison, Madison, WI, USA
| | - John M Wallace
- Department of Plant Science, Pennsylvania State University, University Park, PA, USA
| | - Samantha Wells
- Agronomy and Plant Genetics Department, University of Minnesota, St. Paul, MN, USA
| | - Charles White
- Department of Plant Science, Pennsylvania State University, University Park, PA, USA
| | - Bethany Wolters
- Department of Agriculture, Geosciences and Natural Resources, University of Tennessee at Martin, Martin, TN, USA
| | - Alex Woodley
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, USA
| | - Rongzhong Ye
- Department of Plant & Environmental Sciences, Clemson University, Florence, SC, USA
| | - Eric Youngerman
- Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, US
| | - Brian A Needelman
- Department of Environmental Science & Technology, University of Maryland, College Park, MD, USA
| | - Steven B Mirsky
- U.S. Department of Agriculture, Agricultural Research Service, Sustainable Agricultural Systems Laboratory, Beltsville Agricultural Research Station, Beltsville, MD, USA
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González-Torralva F, Norsworthy JK. Overexpression of Acetyl CoA Carboxylase 1 and 3 ( ACCase1 and ACCase3), and CYP81A21 were related to cyhalofop resistance in a barnyardgrass accession from Arkansas. Plant Signal Behav 2023; 18:2172517. [PMID: 36722712 PMCID: PMC9897766 DOI: 10.1080/15592324.2023.2172517] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/04/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] is the most difficult-to-control weed species of rice production systems worldwide. It has evolved resistance to different herbicide sites of action, including the acetyl-CoA carboxylase (ACCase)-inhibiting herbicides. Target-site mutations conferring resistance to ACCase-inhibiting herbicides are well documented; however, the role of the different ACCase genes in conferring resistance to cyhalofop-p-butyl (cyhalofop), an ACCase-inhibiting herbicide, remains poorly understood. This research assessed the contribution of gene amplification and expression of ACCase genes in a cyhalofop-resistant barnyardgrass accession. Additionally, the expression of glutathione-S-transferases (GSTs) and cytochrome P450 monooxygenases (P450s) genes as possible contributors to resistance to cyhalofop were investigated. Results demonstrated that ACCase gene amplification does not contribute to cyhalofop resistance. However, ACCase1 and ACCase3 were found to be overexpressed in the cyhalofop-resistant barnyardgrass accession. At 24 h after cyhalofop treatment, an overexpression of 2.0- and 2.8-fold was detected in ACCase1 and ACCase3, respectively. In addition, CYP81A21 (a P450 gene) was found to be 2.5-fold overexpressed compared to the susceptible accession in the same time period. These results suggest that ACCase1, ACCase3, and CYP81A21 are crucial genes in contributing cyhalofop resistance in this barnyardgrass accession.
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Affiliation(s)
- Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Jason K. Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
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González-Torralva F, Norsworthy JK. Quizalofop resistance in weedy rice (Oryza sativa L.) is mainly conferred by an Ile1781Leu mutation. Plant Sci 2023; 336:111838. [PMID: 37611832 DOI: 10.1016/j.plantsci.2023.111838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/26/2023] [Accepted: 08/19/2023] [Indexed: 08/25/2023]
Abstract
Weedy rice (Oryza sativa L.) is an economically important weed species in rice (Oryza sativa L.) cropping systems. Two weedy rice samples (acc7 and acc8) suspected to be resistant to quizalofop-ethyl (quizalofop) were collected in Arkansas. In this research, susceptibility to quizalofop and resistance mechanisms have been explored. Dose-response assays displayed a resistance index of 42- and 58-fold for the acc7 and acc8, respectively. Experiments with metabolism inhibitors demonstrated that NBD-Cl (4-chloro-7-nitrobenzofurazan) increased quizalofop efficacy slightly in acc8, whereas malathion did not improve effectiveness in resistant samples. Sequencing of the ACCase gene displayed an Ile1781Leu substitution in the resistant samples, like the mutation present in Provisia™ rice. In addition, an allele-specific PCR was developed to genotype the Ile1781Leu mutation. The gene copy number of ACCase showed similar values among samples. In the resistant plants, a KASP (Kompetitive Allele Specific PCR) assay to detect the ALSS653D (acetolactate synthase) and HIS1 (HPPD Inhibitor Sensitive 1) traits revealed that 37.5% of plants carried the ALSS653D trait, whereas 25% showed the HIS1 allele. In summary, a target-site mutation is the main resistance mechanism to quizalofop in weedy rice. Results also suggest the presence of herbicide metabolism (a non-target site resistance mechanism) mediated by glutathione-S-transferases (GSTs) in one resistant sample.
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Affiliation(s)
- Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA.
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
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5
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Korres NE, Norsworthy JK, FitzSimons T, Roberts TL, Oosterhuis DM, Govindjee G. Author Correction: Evaluation of secondary sexual dimorphism of the dioecious Amaranthus palmeri under abiotic stress. Sci Rep 2023; 13:14155. [PMID: 37644080 PMCID: PMC10465607 DOI: 10.1038/s41598-023-41385-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023] Open
Affiliation(s)
- Nicholas E Korres
- School of Agriculture, Department of Agriculture, University of Ioannina, Kostakii, 47100, Arta, Greece.
| | - Jason K Norsworthy
- Crop Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA
| | | | - Trenton L Roberts
- Crop Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA
| | - Derrick M Oosterhuis
- Crop Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA
| | - Govindjee Govindjee
- Plant Biology, Biochemistry and Biophysics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
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6
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Korres NE, Norsworthy JK, FitzSimons T, Roberts TL, Oosterhuis DM, Govindjee G. Evaluation of secondary sexual dimorphism of the dioecious Amaranthus palmeri under abiotic stress. Sci Rep 2023; 13:13156. [PMID: 37573387 PMCID: PMC10423251 DOI: 10.1038/s41598-023-40453-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/10/2023] [Indexed: 08/14/2023] Open
Abstract
The evolution of secondary sex-specific traits of dioecious species under abiotic stress conditions has received limited research, especially in the case of Amaranthus palmeri, a fast adapting and highly competing plant. Here, we have examined the interactive effects of abiotic stress on mineral accumulation, chlorophyll a and b content, and the operating capacity of Photosystem II (PSII) in both male and female A. palmeri plants grown under three different intensities of white light, and under N, K or P deficiency. Mineral profiling of the leaves and stems (with inflorescence) highlighted intra- and intersexual differences in their accumulation pattern and mineral associations. Chlorophyll a and chlorophyll b were different between the male and the female plants, being slightly lower in the latter, at high light intensity towards maturity, or under K or P deficiency. Further, slight, although statistically significant differences were recorded in the chlorophyll a/b ratio, which was lower at the higher light intensity in the female, over that in the male, plants towards maturity. Chlorophyll fluorescence parameters, i.e., steady state and maximum fluorescence increased under high light intensity, whereas the PSII operating efficiency decreased in the female plants, indicating reduced PSII capacity. Sex-specific differences in A. palmeri showed a differential response to stressful conditions because of differences in their ontogeny and physiology, and possibly due to the cost of reproduction. We suggest that the breeding system of dioecious species has weaknesses that can be used for the ecological management of dioecious weeds without relying on the use of herbicides.
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Affiliation(s)
- Nicholas E Korres
- School of Agriculture, Department of Agriculture, University of Ioannina, Kostakii, 47100, Arta, Greece.
| | - Jason K Norsworthy
- Crop Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA
| | | | - Trenton L Roberts
- Crop Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA
| | - Derrick M Oosterhuis
- Crop Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA
| | - Govindjee Govindjee
- Plant Biology, Biochemistry and Biophysics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
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Hwang JI, Norsworthy JK, McElroy JS, Rutland CA, Barber LT, Butts TR. Metabolic Exploration for Cyhalofop-Butyl Antagonism in Barnyardgrass [ Echinochloa crus-galli (L.) P. Beauv.] Following Pretreatment of Malathion. J Agric Food Chem 2023; 71:6617-6625. [PMID: 37094573 DOI: 10.1021/acs.jafc.3c00735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The present study investigated the effects of broad-spectrum metabolic inhibitors malathion (cytochrome P450 inhibitor) and/or 4-chloro-7-nitrobenzofurazan (NBD-Cl; glutathione S-transferase inhibitor) on the metabolism of cyhalofop-butyl (CyB) in barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] biotypes confirmed previously with multiple resistance to two herbicides CyB and florpyrauxifen-benzyl. The metabolic inhibitors were not effective at recovering the sensitivity of resistant barnyardgrass biotypes to CyB treated at the labeled rate (313 g ai ha-1). Rather, treatment with malathion followed by CyB caused antagonism, reducing the efficacy of CyB and promoting the growth of resistant biotypes. Pretreatment with malathion did not influence absorption/translocation of the applied form CyB and its conversion to the active herbicide form cyhalofop-acid (CyA), in both susceptible and resistant biotypes. In contrast, metabolism of the applied form (CyB) decreased 1.5 to 10.5 times by the malathion pretreatment. Taken together, the maintained CyA production against the reduced CyB metabolism could be the mechanism to account for the cause of CyB antagonism observed in barnyardgrass following malathion pretreatment. Additionally, the evolution of CyB resistance in barnyardgrass might be associated with reduced production of CyA in resistant biotypes, independent of activities of cytochrome P450 or GST enzymes.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72704, United States
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72704, United States
| | - J Scott McElroy
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, Alabama 36831, United States
| | - Claudia Ann Rutland
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, Alabama 36831, United States
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72704, United States
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72704, United States
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Hwang JI, Norsworthy JK, Carvalho-Moore P, Barber LT, Butts TR, McElroy JS. Exploratory Analysis on Herbicide Metabolism and Very-Long-Chain Fatty Acid Production in Metolachlor-Resistant Palmer Amaranth ( Amaranthus palmeri S. Wats.). J Agric Food Chem 2023. [PMID: 37036857 DOI: 10.1021/acs.jafc.3c00196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
A Palmer amaranth (Amaranthus palmeri S. Wats.) biotype resistant to S-metolachlor was confirmed from crop fields in Arkansas, USA. This study investigated the metabolic effects of malathion (cytochrome P450 inhibitor) and 4-chloro-7-nitrobenzofurazan [NBD-Cl; glutathione S-transferase inhibitor] on the S-metolachlor-resistant A. palmeri biotype. Root elongation of the resistant biotype was 20% more inhibited by treatment of NBD-Cl (50 nM) and S-metolachlor (2 μM) in mixture than by treatment of S-metolachlor alone. Metabolites of S-metolachlor were 1.4-12.1 times greater produced in the resistant biotype for 7 d than in the susceptible standard. Production of cerotic acid, one of the very-long-chain fatty acids containing 26 carbons, was more reduced in the susceptible standard (3.8-fold) than in the resistant biotype (1.8-fold) by S-metolachlor treatment. Conclusively, evolution of S-metolachlor resistance observed in this study was likely associated with improved activity of glutathione S-transferases. Further studies are needed to genetically evaluate plant endogenous enzymes involving cerotic acid production.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Pamela Carvalho-Moore
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - J Scott McElroy
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, Alabama 36831, United States
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9
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Zaccaro-Gruener ML, Norsworthy JK, Brabham CB, Barber LT, Butts TR, Roberts TL, Mauromoustakos A. Evaluation of dicamba volatilization when mixed with glyphosate using imazethapyr as a tracer. J Environ Manage 2022; 317:115303. [PMID: 35613534 DOI: 10.1016/j.jenvman.2022.115303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 04/22/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
Expansion of dicamba-resistant crops increased the frequency of off-target movement issues, especially in the midsouthern United States. Six field trials were conducted over two growing seasons with the purpose to determine the contribution of volatilization and physical suspension of particles to the off-target movement of dicamba when applied with glyphosate and imazethapyr - a non-volatile herbicide used as a tracer for physical off-target movement. Applications included dicamba at 560 g ha-1, glyphosate at 1260 g ha-1, and imazethapyr at 105 g ha-1. Applicators include glyphosate with dicamba to increase the spectrum of weed control from these applications; however, this addition increases potential for dicamba volatilization. Following application of the mixture, air samplers were placed in the field to collect dicamba and imazethapyr. Results showed there was at least 50 times more dicamba than imazethapyr detected even though the dicamba:imazethapyr ratio applied was 5.3:1. Dicamba was detected in the treated area and the off-site locations and all intervals of air sampling, ranging from 126 to 5990 ng. No more than 37.5 ng of imazethapyr was detected during the first 24-h after application (HAA) inside the treated area. Imazethapyr was only detected in 9 of the 20 sampling combinations during these experiments, and most of these detections (6) occurred during the first 24 HAA and inside the treated area. While some movement from the suspension of particles occurred based on the detection of imazethapyr in air samples, results show that most dicamba detection was due to the volatilization of the herbicide.
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Affiliation(s)
| | - Jason K Norsworthy
- Distinguished Professor, University of Arkansas System Division of Agriculture, USA
| | - Chad B Brabham
- Former Postdoctoral Associate, University of Arkansas System Division of Agriculture, USA
| | - L Tom Barber
- Professor and Extension Weed Scientist, University of Arkansas System Division of Agriculture, USA
| | - Thomas R Butts
- Assistant Professor and Extension Weed Scientist, University of Arkansas System Division of Agriculture, USA
| | - Trenton L Roberts
- Associate Professor of Soil Fertility/Soil Testing, University of Arkansas System Division of Agriculture, USA
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Hwang JI, Norsworthy JK, Houston MM, Piveta LB, Priess GL, Zaccaro-Gruener ML, Barber LT, Butts TR. Large-scale evaluation of physical drift and volatility of 2,4-D choline in cotton: a four-year field study. Pest Manag Sci 2022; 78:3337-3344. [PMID: 35490278 DOI: 10.1002/ps.6960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/12/2022] [Accepted: 04/30/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Cotton with resistance to 2,4-d choline, glufosinate and glyphosate allows over-the-top use of these herbicides for postemergence weed control. Nontransgenic cotton is highly responsive to low rates of 2,4-d, causing concern among farmers when the herbicide is applied near the crop. Injury to nearby cotton following application of 2,4-d choline is sometimes blamed on volatilization of the herbicide. RESULTS A large-scale experiment was conducted in 2018-2021 to better understand causes of damage to nearby sensitive cotton following an application of 2,4-d choline plus glufosinate-ammonium. The herbicides were applied to 0.4 ha in the center of a 4-ha non-Enlist cotton field. At 30 min after application, air samplers were established in the treated center and outside the treated area in cardinal directions. The 72-h cumulative air concentration of 2,4-d in the swath ranged from 3.3 to 7.1 ng m-3 , and most volatile residues (5.0-25.5 ng m-3 ) were detected in samplers established in the downwind direction directly adjacent to the treated field. Cotton plants in three downwind transects that were covered for 30 min after application were not damaged by 2,4-d, whereas noncovered plants along the downwind transects were injured. No cotton injury occurred outside the treated area, except in the downwind direction during application even though wind direction changed after application. CONCLUSION 2,4-d choline volatilizes, but findings show that the volatilization is not sufficient to damage cotton in the neighboring area following applications, pointing to the importance of applicators understanding wind direction/shift during the application along with proximity of sensitive crops in the downwind direction. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Michael M Houston
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Leonard B Piveta
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Grant L Priess
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Maria L Zaccaro-Gruener
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
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Hwang JI, Norsworthy JK, González-Torralva F, Piveta LB, Barber LT, Butts TR. Cross-resistance of barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] to aryloxyphenoxypropionate herbicides. Pestic Biochem Physiol 2022; 184:105089. [PMID: 35715035 DOI: 10.1016/j.pestbp.2022.105089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/02/2022] [Accepted: 04/03/2022] [Indexed: 06/15/2023]
Abstract
Managing emerged weeds that have evolved resistance to acetyl CoA carboxylase (ACCase)-inhibiting herbicides is a challenging task. A dose-response experiment was conducted on barnyardgrass biotypes resistant (R) and susceptible (S) to three aryloxyphenoxypropionate herbicides cyhalofop-butyl (CyB), fenoxaprop-ethyl (FeE), and quizalofop-ethyl (QuE) along with investigations into the potential resistance mechanism of these biotypes. The tested R barnyardgrass biotypes had strong resistance to CyB and FeE (resistant/susceptible ratio: 7.9-14.4) but weak resistance to QuE (resistant/susceptible ratio: 2.4-3.1). Absorption, translocation, and total metabolism of CyB and QuE were not associated with differences among S and R barnyardgrass biotypes. However, differences between S and R barnyardgrass were observed in production of active acid forms of each herbicide (cyhalofop-acid and quizalofop-acid). Production of cyhalofop-acid was >1.6-fold less in R barnyardgrass (3-8%) for 24 h after herbicide application than in the S barnyardgrass (8-16%). Meanwhile, production of quizalofop-acid was less in R barnyardgrass (< 14%) throughout the study period than in the S barnyardgrass (< 22%). Sequencing results of ACCase gene showed no difference between S and R barnyardgrass. Overall results show that a non-target-site resistance mechanism altering metabolism of CyB and QuE likely contributes to resistance of the barnyardgrass biotypes to these herbicides.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA.
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Leonard B Piveta
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
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Farr R, Norsworthy JK, Barber LT, Butts TR, Roberts T. Utility of roller wiper applications of dicamba for Palmer amaranth control in soybean. Pest Manag Sci 2022; 78:2151-2160. [PMID: 35170207 PMCID: PMC9314051 DOI: 10.1002/ps.6838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/09/2022] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND The commercialization of dicamba-resistant soybean has resulted in increased concern for off-target movement of dicamba onto sensitive vegetation. To mitigate the off-target movement through physical drift, one might consider use of rope wicks and other wiper applicators. Although wiper-type application methods have been efficacious in pasture settings, the utility of dicamba using wiper applicators in agronomic crops is not available in scientific literature. To determine the utility of roller wipers for dicamba applications in dicamba-resistant soybean, two separate experiments were conducted in the summer of 2020 and replicated in both Keiser and Fayetteville, AR, USA. RESULTS Utilizing opposing application directions and a 2:1:1 ratio of water: formulated glyphosate: formulated dicamba were the most efficacious practices for controlling Palmer amaranth. The high herbicide concentrations and wiping in opposing directions increased dicamba-resistant soybean injury when the wiper contacted the crop, but no yield loss was observed because of this injury. Broadcast applications resulted in greater Palmer amaranth mortality than roller wiper applications, and the most effective roller wiper treatments were when two sequential applications were made inside the crop canopy. CONCLUSIONS Dicamba applications require adequate coverage for optimum weed control. While efforts can be made to increase roller wiper efficacy by optimizing coverage and timing of applications, broadcast applications are superior to roller wiper applicators for weed control. Roller wiper applications did not reduce soybean yield, thus wiper-type applications may be safely used in dicamba-resistant soybean, albeit the likelihood for off-target damage caused by volatilization of these treatments would need to be investigated. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Rodger Farr
- Department of Crop, Soil, and Environmental SciencesUniversity of ArkansasFayettevilleARUSA
| | - Jason K. Norsworthy
- Department of Crop, Soil, and Environmental SciencesUniversity of ArkansasFayettevilleARUSA
| | - L. Tom Barber
- Department of Crop, Soil, and Environmental SciencesUniversity of Arkansas Systems Division of AgricultureLonokeARUSA
| | - Thomas R. Butts
- Department of Crop, Soil, and Environmental SciencesUniversity of Arkansas Systems Division of AgricultureLonokeARUSA
| | - Trent Roberts
- Department of Crop, Soil, and Environmental SciencesUniversity of ArkansasFayettevilleARUSA
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Hwang JI, Norsworthy JK, González-Torralva F, Piveta LB, Priess GL, Barber LT, Butts TR. Absorption, translocation, and metabolism of florpyrauxifen-benzyl and cyhalofop-butyl in cyhalofop-butyl-resistant barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.]. Pestic Biochem Physiol 2022; 180:104999. [PMID: 34955183 DOI: 10.1016/j.pestbp.2021.104999] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/08/2021] [Accepted: 11/18/2021] [Indexed: 06/14/2023]
Abstract
Dose-response experiments were conducted to assess the sensitivity of one susceptible and three putative resistant (R1, R2, and R3) barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] biotypes to florpyrauxifen-benzyl and cyhalofop-butyl alone and as a formulated premix. Subsequently, potential resistance mechanisms of the barnyardgrass were evaluated. Based on biomass reduction results, resistant/susceptible ratios were calculated for R1 (7.0-50), R2 (7.0-150), and R3 (18-214) biotypes. Absorption and translocation of [14C]-florpyrauxifen-benzyl decreased in R1 and R3 biotypes, but not for [14C]-cyhalofop-butyl. The metabolism of [14C]-florpyrauxifen-benzyl to [14C]-florpyrauxifen-acid was >2-fold less in resistant biotypes (9-11%) than in the susceptible biotype (23%). Moreover, the production of [14C]-florpyrauxifen-acid in susceptible barnyardgrass (not in the R biotypes) increased 3-fold when florpyrauxifen-benzyl and cyhalofop-butyl were applied in mixture compared to florpyrauxifen-benzyl applied alone. The tested barnyardgrass biotypes had no mutation in the Transport Inhibitor Response1, auxin-signaling F-box, and acetyl coenzyme A carboxylase genes. Although further studies on cyhalofop-butyl resistance with respect to analysis of specific metabolites are needed, our findings in this study demonstrates that the evolution of florpyrauxifen-benzyl resistance in multiple resistant barnyardgrass can be related to non-target-site resistance mechanisms reducing absorption and translocation of the herbicide and causing reduced conversion or rapid degradation of florpyrauxifen-acid.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA.
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Leonard B Piveta
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Grant L Priess
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
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Hwang JI, Norsworthy JK, González-Torralva F, Priess GL, Barber LT, Butts TR. Non-target-site resistance mechanism of barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] to florpyrauxifen-benzyl. Pest Manag Sci 2022; 78:287-295. [PMID: 34482604 DOI: 10.1002/ps.6633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/26/2021] [Accepted: 09/05/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Florpyrauxifen-benzyl (FPB) is an arylpicolinate herbicide (Group IV) for barnyardgrass control in rice. One susceptible (Sus) and three putative FPB-resistant (R1, R2, and R3) barnyardgrass biotypes were selected based on resistant/susceptible (R/S) ratios obtained from dose-response tests and used to investigate the potential resistance mechanisms. RESULTS Based on visual control results, the R/S ratios of barnyardgrass biotypes R1, R2, and R3 were 60-, 33-, and 16-fold greater than the Sus standard, respectively. Sequencing results of TIR1 and AFB genes in the tested barnyardgrass revealed no difference between Sus and R barnyardgrass biotypes. Absorption of [14 C]-FPB in Sus barnyardgrass increased over time and reached 90%, which was >10 percentage points greater than that in R biotypes. The [14 C]-FPB absorption in all R barnyardgrass equilibrated after 48 h. For both Sus and R barnyardgrass, most [14 C]-FPB absorbed was present in the treated leaf (79.8-88.8%), followed by untreated aboveground (9.5-18.6%) and belowground tissues (1.3-2.2%). No differences in translocation were observed. Differences between Sus and R barnyardgrass biotypes were found for FPB metabolism. Production of the active metabolite, florpyrauxifen-acid, was greater in Sus barnyardgrass (21.5-52.1%) than in R barnyardgrass (5.5-34.9%). CONCLUSION In conclusion, reductions in FPB absorption and florpyrauxifen-acid production may contribute to the inability to control barnyardgrass with FPB. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Grant L Priess
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
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15
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González-Torralva F, Norsworthy JK. Understanding Resistance Mechanisms to Trifluralin in an Arkansas Palmer Amaranth Population. Genes (Basel) 2021; 12:genes12081225. [PMID: 34440399 PMCID: PMC8394034 DOI: 10.3390/genes12081225] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/05/2021] [Accepted: 08/05/2021] [Indexed: 11/16/2022] Open
Abstract
Amaranthus palmeri S. Watson (Palmer amaranth) is considered a problematic and troublesome weed species in many crops in the USA, partly because of its ability to evolve resistance to herbicides. In this study, we explored the mechanism of resistance in a trifluralin-resistant A. palmeri accession collected from Arkansas, USA. Dose-response assays using agar plates demonstrated an EC50 (effective concentration that reduces root length by 50%) of 1.02 µM trifluralin compared to 0.39 µM obtained in the susceptible accession. Thus, under these conditions, the resistant accession required 2.6 times more trifluralin to inhibit root length by 50%. Seeds in the presence or absence of the cytochrome P450-inhibitior malathion displayed a differential response with no significant influence on root length, suggesting that resistance is not P450-mediated. In addition, application of 4-chloro-7-nitrobenzofurazan (NBD-Cl), a glutathione S-transferase (GST) inhibitor, showed significant differences in root length, indicating that GSTs are most likely involved in the resistance mechanism. Sequencing of α- and β-tubulin genes revealed no single nucleotide polymorphisms (SNPs) previously described between accessions. In addition, relative gene copy number of α- and β-tubulin genes were estimated; however, both resistant and susceptible accessions displayed similar gene copy numbers. Overall, our results revealed that GST-mediated metabolism contributes to trifluralin resistance in this A. palmeri accession from Arkansas.
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Shergill LS, Schwartz-Lazaro LM, Leon R, Ackroyd VJ, Flessner ML, Bagavathiannan M, Everman W, Norsworthy JK, VanGessel MJ, Mirsky SB. Current outlook and future research needs for harvest weed seed control in North American cropping systems. Pest Manag Sci 2020; 76:3887-3895. [PMID: 32633078 DOI: 10.1002/ps.5986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 07/02/2020] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
Harvest weed seed control (HWSC) comprises a set of tools and tactics that prevents the addition of weed seed to the soil seed bank, attenuating weed infestations and providing a method to combat the development and spread of herbicide-resistant weed populations. Initial HWSC research efforts in North America are summarized and, combined with the vast area of crops suitable for HWSC, clearly indicate strong potential for this technology. However, potential limitations exist that are not present in Australian cropping systems where HWSC was developed. These include rotations with crops that are not currently amenable to HWSC (e.g. corn), high moisture content at harvest, untimely harvest, and others. Concerns about weeds becoming resistant to HWSC (i.e. adapting) exist, as do shifts in weed species composition, particularly with the diversity of weeds in North America. Currently the potential of HWSC vastly outweighs any drawbacks, necessitating further research. Such expanded efforts should foremost include chaff lining and impact mill commercial scale evaluation, as this will address potential limitations as well as economics. Growers must be integrated into large-scale, on-farm research and development activities aimed at alleviating the problems of using HWSC systems in North America and drive greater adoption subsequently. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Lovreet S Shergill
- Southern Agricultural Research Center, Montana State University, Huntley, MT, USA
- Beltsville Agricultural Research Center, USDA-ARS, Beltsville, MD, USA
- Carvel Research and Education Center, University of Delaware, Georgetown, DE, USA
| | - Lauren M Schwartz-Lazaro
- School of Plant, Environmental, and Soil Sciences, Louisiana State University AgCenter, Baton Rouge, LA, USA
| | - Ramon Leon
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, USA
| | - Victoria J Ackroyd
- Sustainable Agricultural Systems Laboratory, Beltsville Agricultural Research Center, USDA-ARS, Beltsville, MD, USA
| | - Michael L Flessner
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, USA
| | | | - Wesley Everman
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, USA
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Mark J VanGessel
- Carvel Research and Education Center, University of Delaware, Georgetown, DE, USA
| | - Steven B Mirsky
- Sustainable Agricultural Systems Laboratory, Beltsville Agricultural Research Center, USDA-ARS, Beltsville, MD, USA
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Meyer CJ, Peter F, Norsworthy JK, Beffa R. Uptake, translocation, and metabolism of glyphosate, glufosinate, and dicamba mixtures in Echinochloa crus-galli and Amaranthus palmeri. Pest Manag Sci 2020; 76:3078-3087. [PMID: 32281195 DOI: 10.1002/ps.5859] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 04/02/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Echinochloa crus-galli (L.) Beauv. and Amaranthus palmeri S. Wats are two common and problematic weeds prevalent across the Midsouth of the USA. Herbicide absorption, translocation, and metabolism were investigated as potential sources of herbicide antagonism on A. palmeri and E. crus-galli using 14 C-labeled herbicides. Three 14 C-labeled herbicides, glyphosate, glufosinate, and dicamba, were utilized individually in separate experiments. RESULTS Uptake of 14 C-glyphosate in E. crus-galli was 15% of the total applied radioactivity for glyphosate/glufosinate (897 + 595 g a.i./a.e. ha-1 ) compared to 25% for glyphosate alone. Similarly, uptake of 14 C-glyphosate in A. palmeri reduced by 10% when applied with glufosinate. Applying glyphosate/dicamba (897/560 g a.e. ha-1 ) reduced 14 C-glyphosate uptake in both species. In the 14 C-glufosinate experiment, both species absorbed less 14 C-glufosinate when mixed with glyphosate compared to glufosinate alone. No metabolic degradation of glyphosate was observed in either species. E. crus-galli metabolized dicamba 23 times faster than A. palmeri. When glufosinate was applied with dicamba, metabolic degradation of 14 C-dicamba was limited in both species. For example, 99.9% of the applied radioactivity was recovered in A. palmeri as the parent compound when 14 C-glufosinate dicamba was applied with glufosinate, compared to 95.7% for dicamba alone. CONCLUSION These findings demonstrate absorption, translocation, or metabolism of dicamba, glufosinate, and glyphosate can be affected by mixing with another herbicide. As mixing two herbicides is often a critical component of resistance management, careful investigation into the performance of these mixtures in the field is needed. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Chris J Meyer
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Falco Peter
- Bayer AG, Division CropScience, Weed Resistance Research, Frankfurt am Main, Germany
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Roland Beffa
- Bayer AG, Division CropScience, Weed Resistance Research, Frankfurt am Main, Germany
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18
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Frisvold GB, Albright J, Ervin DE, Owen MD, Norsworthy JK, Dentzman KE, Hurley TM, Jussaume RA, Gunsolus JL, Everman W. Do farmers manage weeds on owned and rented land differently? Evidence from US corn and soybean farms. Pest Manag Sci 2020; 76:2030-2039. [PMID: 31930763 DOI: 10.1002/ps.5737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 11/16/2019] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND It has been frequently argued that growers have less incentive to manage the evolution and spread of herbicide-resistant weeds on leased than on owned land. This is because resistance management provides long-term rather than short-term benefits that operators may be less assured of capturing on land they do not own. Yet, empirical evidence supporting this argument has been lacking. RESULTS This study reports on results from a large-scale national survey of weed management and other crop production practices on US agricultural fields. Up to 11 weed management practices were compared across owner-operated versus renter-operated fields. Analysis of survey data from corn and soybean fields did not support the hypothesis that adoption of resistance management practices is lower on rented acres. In most instances, there were no statistically significant differences in herbicide use or weed management practices on rented versus owned land. This was true at both national and regional levels of analysis. Where there were significant differences, practices associated with greater herbicide resistance management were, as often as not, more prevalent on rented than owned land. CONCLUSIONS A useful area of future research would be to test for land tenure differences in resistance management using multivariate analysis to control for confounding effects. Unobserved farmer or land characteristics may be confounding results and masking land tenure effects. Results here, however, suggest that these other effects are dominating any obvious disincentive effects of land leasing on resistance management. Of greater concern, the adoption of key resistance management practices was low on both owned and rented land. © 2020 Society of Chemical Industry.
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Affiliation(s)
- George B Frisvold
- Department of Agricultural & Resource Economics, University of Arizona, Tucson, AZ, USA
| | | | - David E Ervin
- Department of Economics, Portland State University, Portland, OR, USA
- Department of Environmental Management, Portland State University, Portland, OR, USA
| | - Micheal Dk Owen
- Department of Agronomy, Iowa State University, Ames, IA, USA
| | - Jason K Norsworthy
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Katherine E Dentzman
- Department of Agricultural Economics & Rural Sociology, University of Idaho, Moscow, ID, USA
| | - Terrance M Hurley
- Department of Applied Economics, University of Minnesota, Minneapolis, MN, USA
| | - Raymond A Jussaume
- Department of Sociology, Michigan State University, East Lansing, MI, USA
| | - Jeffrey L Gunsolus
- Department of Agronomy and Plant Genetics, University of Minnesota, Minneapolis, MN, USA
| | - Wesley Everman
- Department of Weed Sciences, North Carolina State University, Raleigh, NC, USA
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Walsh MJ, Broster JC, Schwartz-Lazaro LM, Norsworthy JK, Davis AS, Tidemann BD, Beckie HJ, Lyon DJ, Soni N, Neve P, Bagavathiannan MV. Opportunities and challenges for harvest weed seed control in global cropping systems. Pest Manag Sci 2018; 74:2235-2245. [PMID: 29193725 DOI: 10.1002/ps.4802] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 11/18/2017] [Accepted: 11/21/2017] [Indexed: 05/26/2023]
Abstract
The opportunity to target weed seeds during grain harvest was established many decades ago following the introduction of mechanical harvesting and the recognition of high weed-seed retention levels at crop maturity; however, this opportunity remained largely neglected until more recently. The introduction and adoption of harvest weed seed control (HWSC) systems in Australia has been in response to widespread occurrence of herbicide-resistant weed populations. With diminishing herbicide resources and the need to maintain highly productive reduced tillage and stubble-retention practices, growers began to develop systems that targeted weed seeds during crop harvest. Research and development efforts over the past two decades have established the efficacy of HWSC systems in Australian cropping systems, where widespread adoption is now occurring. With similarly dramatic herbicide resistance issues now present across many of the world's cropping regions, it is timely for HWSC systems to be considered for inclusion in weed-management programs in these areas. This review describes HWSC systems and establishing the potential for this approach to weed control in several cropping regions. As observed in Australia, the inclusion of HWSC systems can reduce weed populations substantially reducing the potential for weed adaptation and resistance evolution. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Michael J Walsh
- Sydney Institute of Agriculture, University of Sydney, Narrabri, Australia
| | - John C Broster
- Graham Centre for Agricultural Innovation, Charles Sturt University, Wagga Wagga, Australia
| | - Lauren M Schwartz-Lazaro
- School of Plant, Environmental, and Soil Sciences, Louisiana State University AgCenter, Baton Rouge, USA
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, USA
| | - Adam S Davis
- USDA-ARS Global Change and Photosynthesis Research Unit, Urbana, USA
| | | | | | - Drew J Lyon
- Crop & Soil Sciences, Washington State University, Pullman, USA
| | - Neeta Soni
- Bioagricultural Sciences and Pest Management Department, Colorado State University, Fort Collins, USA
| | - Paul Neve
- Agroecology, Rothamsted Research, Harpenden, UK
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Frisvold GB, Bagavathiannan MV, Norsworthy JK. Positive and normative modeling for Palmer amaranth control and herbicide resistance management. Pest Manag Sci 2017; 73:1110-1120. [PMID: 28139047 DOI: 10.1002/ps.4537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 01/14/2017] [Accepted: 01/24/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND Dynamic optimization models are normative; they solve for what growers 'ought to do' to maximize some objective, such as long-run profits. While valuable for research, such models are difficult to solve computationally, limiting their applicability to grower resistance management education. While discussing properties of normative models in general, this study presents results of a specific positive model of herbicide resistance management, applied to Palmer amaranth control on a representative cotton farm. This positive model compares a proactive resistance management strategy to a reactive strategy with lower short-run costs, but greater risk of herbicide resistance developing. RESULTS The proactive strategy can pay for itself within 1-4 years, with a yield advantage of 4% or less if the yield advantage begins within 1-2 years of adoption. Whether the proactive strategy is preferable is sensitive to resistance onset and yield losses, but less sensitive to cotton prices or baseline yields. Industry rebates to encourage residual herbicide use (to delay resistance to post-emergence treatments) may be too small to alter grower behavior or they may be paid to growers who would have used residuals anyway. Rebates change grower behavior over a relatively narrow range of model parameters. The size of rebates needed to induce a grower to adopt the proactive strategy declines significantly if growers extend their planning horizon from 1 year to 3-4 years. CONCLUSIONS Whether proactive resistance management is more profitable than a reactive strategy is more sensitive to biological parameters than economic ones. Simulation results suggest growers with longer time horizons (perhaps younger ones) would be more responsive to rebate programs. More empirical work is needed to determine how much rebates increase residual use above what would occur without them. © 2017 Society of Chemical Industry.
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Affiliation(s)
- George B Frisvold
- Department of Agricultural & Resource Economics, University of Arizona, Tucson, AZ, USA
| | | | - Jason K Norsworthy
- Department of Crop, Soil, & Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
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Tehranchian P, Norsworthy JK, Korres NE, McElroy S, Chen S, Scott RC. Resistance to aryloxyphenoxypropionate herbicides in Amazon sprangletop: Confirmation, control, and molecular basis of resistance. Pestic Biochem Physiol 2016; 133:79-84. [PMID: 27742365 DOI: 10.1016/j.pestbp.2016.02.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 02/27/2016] [Accepted: 02/28/2016] [Indexed: 06/06/2023]
Abstract
Amazon sprangletop is problematic weed of rice in the midsouthern USA. Two biotypes of this species from rice fields approximately 100km apart in Louisiana were unaffected when sprayed with the labeled field rate of cyhalofop-butyl (314g ai ha-1) in 2008. Dose response studies were conducted to confirm the level of resistance to cyhalofop-butyl over a range of doses. Cross-resistance to acetyl-CoA carboxylase (ACCase)-inhibiting herbicides from two different chemical families and multiple herbicide resistance to other mechanisms of action were evaluated. Sequencing using the Illumina Hiseq platform and ACCase gene sequencing revealed two different amino acid substitutions, Trp2027-to-Cys in the first resistant biotype and Asp2078-to-Gly in the second resistant biotype, within the CT domain of the ACCase gene. Two known amino acid substitutions confirmed resistance to cyhalofop-butyl and fenoxaprop-P-ethyl in resistant Amazon sprangletop biotypes. Asp2078-to-Gly amino acid substitution that was detected in one of the resistant biotypes did not result in cross-resistance to clethodim, an ACCase-inhibiting cyclohexandione herbicide which has endowed clethodim resistance in other weed species. Based on this research, both resistant Amazon sprangletop biotypes have evolved target-site resistance to the APP herbicides; yet, alternative herbicides are still active on these plants.
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Affiliation(s)
- Parsa Tehranchian
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA.
| | - Jason K Norsworthy
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Nicholas E Korres
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Scott McElroy
- Department of Crop, Soil, and Environmental Sciences, Auburn University, 201 Funchess Hall, Auburn, AL, USA
| | - Shu Chen
- Department of Crop, Soil, and Environmental Sciences, Auburn University, 201 Funchess Hall, Auburn, AL, USA
| | - Robert C Scott
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
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Bagavathiannan MV, Norsworthy JK. Multiple-Herbicide Resistance Is Widespread in Roadside Palmer Amaranth Populations. PLoS One 2016; 11:e0148748. [PMID: 27071064 PMCID: PMC4829146 DOI: 10.1371/journal.pone.0148748] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 01/22/2016] [Indexed: 12/03/2022] Open
Abstract
Herbicide-resistant Palmer amaranth is a widespread issue in row-crop production in the Midsouthern US. Palmer amaranth is commonly found on roadside habitats in this region, but little is known on the degree of herbicide resistance in these populations. Herbicide resistance in roadside Palmer amaranth populations can represent the spread of an adaptive trait across a selective landscape. A large-scale survey was carried out in the Mississippi Delta region of eastern Arkansas to document the level of resistance in roadside Palmer amaranth populations to pyrithiobac and glyphosate, two important herbicides with broad history of use in the region. A total of 215 Palmer amaranth populations collected across 500 random survey sites were used in the evaluations. About 89 and 73% of the surveyed populations showed >90% survival to pyrithiobac and glyphosate, respectively. Further, only 3% of the populations were completely susceptible to glyphosate, while none of the populations was completely controlled by pyrithiobac. Among the 215 populations evaluated, 209 populations showed multiple resistance to both pyrithiobac and glyphosate at varying degrees. Dose-response assays confirmed the presence of high levels of herbicide resistance in the five selected populations (≥ 25-fold compared to a susceptible standard). Results demonstrate the prevalence of multiple-herbicide resistance in roadside Palmer amaranth populations in this region. Growers should be vigilant of Palmer amaranth infestation in roadsides adjacent to their fields and implement appropriate control measures to prevent likely spread of herbicide resistance into their fields.
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Affiliation(s)
| | - Jason K. Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas, United States of America
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Bagavathiannan MV, Norsworthy JK. Modeling the evolution of herbicide resistance in weeds: Current knowledge and future directions. ACTA ACUST UNITED AC 2016. [DOI: 10.5958/0974-8164.2016.00032.0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tehranchian P, Norsworthy JK, Nandula V, McElroy S, Chen S, Scott RC. First report of resistance to acetolactate-synthase-inhibiting herbicides in yellow nutsedge (Cyperus esculentus): confirmation and characterization. Pest Manag Sci 2015; 71:1274-1280. [PMID: 25307777 DOI: 10.1002/ps.3922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 09/27/2014] [Accepted: 09/29/2014] [Indexed: 06/04/2023]
Abstract
BACKGROUND Yellow nutsedge is one of the most problematic sedges in Arkansas rice, requiring the frequent use of halosulfuron (sulfonylurea) for its control. In the summer of 2012, halosulfuron at 53 g ha(-1) (labeled field rate) failed to control yellow nutsedge. The level of resistance to halosulfuron was determined in the putative resistant biotype, and its cross-resistance to other acetolactate synthase (ALS) inhibitors from four different herbicide families. ALS enzyme assays and analysis of the ALS gene were used to ascertain the resistance mechanism. RESULTS None of the resistant plants was killed by halosulfuron at a dose of 13 568 g ha(-1) (256× the field dose), indicating a high level of resistance. Based on the whole-plant bioassay, the resistant biotype was not controlled by any of the ALS-inhibiting herbicides (imazamox, imazethapyr, penoxsulam, bispyribac, pyrithiobac-sodium, bensulfuron and halosulfuron) tested at the labeled field rate. The ALS enzyme from the resistant biotype was 2540 times less responsive to halosulfuron than the susceptible biotype, and a Trp574 -to-Leu substitution was detected by ALS gene sequencing using the Illumina HiSeq. CONCLUSION The results suggest a target-site alteration as the mechanism of resistance in yellow nutsedge, which accounts for the cross-resistance to other ALS-inhibiting herbicide families.
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Affiliation(s)
- Parsa Tehranchian
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Jason K Norsworthy
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Vijay Nandula
- Crop Production Systems Research Unit, United States Department of Agriculture, Agricultural Research Service, Stoneville, MS, USA
| | - Scott McElroy
- Department of Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL, USA
| | - Shu Chen
- Department of Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL, USA
| | - Robert C Scott
- Department of Crop, Soil and Environmental Sciences, Lonoke, AR, USA
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Owen MDK, Beckie HJ, Leeson JY, Norsworthy JK, Steckel LE. Integrated pest management and weed management in the United States and Canada. Pest Manag Sci 2015; 71:357-376. [PMID: 25346235 DOI: 10.1002/ps.3928] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 10/04/2014] [Accepted: 10/18/2014] [Indexed: 05/28/2023]
Abstract
There is interest in more diverse weed management tactics because of evolved herbicide resistance in important weeds in many US and Canadian crop systems. While herbicide resistance in weeds is not new, the issue has become critical because of the adoption of simple, convenient and inexpensive crop systems based on genetically engineered glyphosate-tolerant crop cultivars. Importantly, genetic engineering has not been a factor in rice and wheat, two globally important food crops. There are many tactics that help to mitigate herbicide resistance in weeds and should be widely adopted. Evolved herbicide resistance in key weeds has influenced a limited number of growers to include a more diverse suite of tactics to supplement existing herbicidal tactics. Most growers still emphasize herbicides, often to the exclusion of alternative tactics. Application of integrated pest management for weeds is better characterized as integrated weed management, and more typically integrated herbicide management. However, adoption of diverse weed management tactics is limited. Modifying herbicide use will not solve herbicide resistance in weeds, and the relief provided by different herbicide use practices is generally short-lived at best. More diversity of tactics for weed management must be incorporated in crop systems.
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Bagavathiannan MV, Norsworthy JK. Pollen-mediated transfer of herbicide resistance in Echinochloa crus-galli. Pest Manag Sci 2014; 70:1425-1431. [PMID: 24623467 DOI: 10.1002/ps.3775] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 12/23/2013] [Indexed: 06/03/2023]
Abstract
BACKGROUND Pollen-mediated gene flow (PMGF) can facilitate the dispersal and spread of herbicide resistance from one weed population to another within an agricultural landscape. The aim of this study was to quantify the extent of PMGF in Echinochloa crus-galli (barnyardgrass), an important herbicide-resistant weed species in the United States and across the world. RESULTS Gene flow declined exponentially with distance, and the double exponential decay model predicted an average gene flow of 5.6% when the pollen donor and recipient plants were at a close distance of 0.25 m from each other (12.5% at 0 m). Gene flow declined by 90% at 0.9 m from the pollen source, yet gene flow was detected as far as 50 m (the farthest distance studied). The farthest gene flow occurred in directions of the fastest wind events, but mean gene flow levels were similar among the directions. CONCLUSION Results indicate that long-distance, landscape-scale PMGF is unlikely in barnyardgrass, but gene flow is likely to occur between adjacent fields at levels greater than initial frequencies of resistance alleles in natural, unselected populations. Thus, any resistance management strategy should consider the likelihood that PMGF can contribute to the spread of herbicide resistance between production fields.
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Jha P, Norsworthy JK, Garcia J. Depletion of an Artificial Seed Bank of Palmer Amaranth (<i>Amaranthus palmeri</i>) over Four Years of Burial*. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ajps.2014.511173] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Busi R, Vila-Aiub MM, Beckie HJ, Gaines TA, Goggin DE, Kaundun SS, Lacoste M, Neve P, Nissen SJ, Norsworthy JK, Renton M, Shaner DL, Tranel PJ, Wright T, Yu Q, Powles SB. Herbicide-resistant weeds: from research and knowledge to future needs. Evol Appl 2013; 6:1218-21. [PMID: 24478803 PMCID: PMC3901551 DOI: 10.1111/eva.12098] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Accepted: 08/05/2013] [Indexed: 11/23/2022] Open
Abstract
Synthetic herbicides have been used globally to control weeds in major field crops. This has imposed a strong selection for any trait that enables plant populations to survive and reproduce in the presence of the herbicide. Herbicide resistance in weeds must be minimized because it is a major limiting factor to food security in global agriculture. This represents a huge challenge that will require great research efforts to develop control strategies as alternatives to the dominant and almost exclusive practice of weed control by herbicides. Weed scientists, plant ecologists and evolutionary biologists should join forces and work towards an improved and more integrated understanding of resistance across all scales. This approach will likely facilitate the design of innovative solutions to the global herbicide resistance challenge.
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Affiliation(s)
- Roberto Busi
- School of Plant Biology, University of Western Australia Perth, WA, Australia
| | - Martin M Vila-Aiub
- School of Plant Biology, University of Western Australia Perth, WA, Australia ; IFEVA - CONICET - Facultad de Agronomía, Universidad de Buenos Aires Buenos Aires, Argentina
| | - Hugh J Beckie
- Saskatoon Research Centre, Agriculture and Agri-Food Canada Saskatoon, SK, Canada
| | - Todd A Gaines
- School of Plant Biology, University of Western Australia Perth, WA, Australia
| | - Danica E Goggin
- School of Plant Biology, University of Western Australia Perth, WA, Australia
| | | | - Myrtille Lacoste
- School of Plant Biology, University of Western Australia Perth, WA, Australia
| | - Paul Neve
- School of Life Sciences, Warwick HRI, University of Warwick Warwick, UK
| | - Scott J Nissen
- Department of Bioagricultural Sciences and Pest Management, Colorado State University Fort Collins, CO, USA
| | - Jason K Norsworthy
- Crop, Soil, and Environmental Sciences Department (Weed Science), University of Arkansas Fayetteville, AR, USA
| | - Michael Renton
- School of Plant Biology, University of Western Australia Perth, WA, Australia
| | - Dale L Shaner
- Agricultural Research Service, US Department of Agriculture Fort Collins, CO, USA
| | - Patrick J Tranel
- Department of Crop Science, University of Illinois Urbana, IL, USA
| | - Terry Wright
- Intellectual Property Portfolio Development, Dow AgroSciences Indianapolis, IN, USA
| | - Qin Yu
- School of Plant Biology, University of Western Australia Perth, WA, Australia
| | - Stephen B Powles
- School of Plant Biology, University of Western Australia Perth, WA, Australia
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Riar DS, Norsworthy JK, Srivastava V, Nandula V, Bond JA, Scott RC. Physiological and molecular basis of acetolactate synthase-inhibiting herbicide resistance in barnyardgrass (Echinochloa crus-galli). J Agric Food Chem 2013; 61:278-89. [PMID: 23237199 DOI: 10.1021/jf304675j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Barnyardgrass biotypes from Arkansas (AR1 and AR2) and Mississippi (MS1) have evolved cross-resistance to imazamox, imazethapyr, and penoxsulam. Additionally, AR1 and MS1 have evolved cross-resistance to bispyribac-sodium. Studies were conducted to determine if resistance to acetolactate synthase (ALS)-inhibiting herbicides in these biotypes is target-site or non-target-site based. Sequencing and analysis of a 1701 base pair ALS coding sequence revealed Ala₁₂₂ to Val and Ala₁₂₂ to Thr substitutions in AR1 and AR2, respectively. The imazamox concentrations required for 50% inhibition of ALS enzyme activity in vitro of AR1 and AR2 were 2.0 and 5.8 times, respectively, greater than the susceptible biotype. Absorption of ¹⁴C-bispyribac-sodium, -imazamox, and -penoxsulam was similar in all biotypes. ¹⁴C-Penoxsulam translocation out of the treated leaf (≤2%) was similar among all biotypes. ¹⁴C-Bispyribac-treated AR1 and MS1 translocated 31- 43% less radioactivity to aboveground tissue below the treated leaf compared to the susceptible biotype. ¹⁴C-Imazamox-treated AR1 plants translocated 39% less radioactivity above the treated leaf and aboveground tissue below the treated leaf, and MS1 translocated 54 and 18% less radioactivity to aboveground tissue above and below the treated leaf, respectively, compared to the susceptible biotype. Phosphorimaging results further corroborated the above results. This study shows that altered target site is a mechanism of resistance to imazamox in AR2 and probably in AR1. Additionally, reduced translocation, which may be a result of metabolism, could contribute to imazamox and bispyribac-sodium resistance in AR1 and MS1.
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Affiliation(s)
- Dilpreet S Riar
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, 1366 West Altheimer Drive, Fayetteville, Arkansas 72704, USA.
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Malik MS, Riley MB, Norsworthy JK, Bridges W. Variation of glucosinolates in wild radish (Raphanus raphanistrum) accessions. J Agric Food Chem 2010; 58:11626-32. [PMID: 20964435 DOI: 10.1021/jf102809b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Glucosinolate composition was determined in wild radish accessions from eight states in the northeastern and southern United States to determine the variability of production among accessions. Glucosinolates were evaluated from roots, leaves, flowers, primary, and secondary branches. Seventeen glucosinolates were identified, with glucoerucin, glucoraphenin, glucobrassicin, and gluconasturtiin contributing 90% to 100% of the total glucosinolates. Flowers contained the highest glucosinolate concentrations, 12.07 to 55.36 μmol/g, but flowers contributed only 5.3 to 21.3% to the total glucosinolates. Of the eight accessions, the Mississippi accession produced significantly higher levels of total glucosinolates and glucosinolates which can be degraded to isothiocyanates per plant, totals of 618.97 and 563.53 μmol/plant, respectively. Total plant biomass did not differ between accessions indicating a difference in the ability of the Mississippi accession to produce glucosinolates. Further studies are needed to determine if this accession would consistently produce higher glucosinolate levels under different environmental conditions.
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Affiliation(s)
- Mayank S Malik
- TDRA, Scott Learning Center, Monsanto Company, Scott, Mississippi 38772, United States
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Malik MS, Riley MB, Norsworthy JK, Bridges W. Glucosinolate profile variation of growth stages of wild radish (Raphanus raphanistrum). J Agric Food Chem 2010; 58:3309-3315. [PMID: 20163113 DOI: 10.1021/jf100258c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Wild radish (Raphanus raphanistrum L.) produces glucosinolates (GSL), which are important for its use as a biofumigation or allelopathic plant for weed management. Total GSL concentrations and individual GSLs were quantified in different plant parts at different developmental stages. Eight GSLs were found in various plant tissues but glucoerucin, glucoraphenin, and glucotropaeolin comprised >90% of the total GSLs. All three are degraded to isothiocyanates, which are associated with weed suppression. Maximum GSL concentration (1942.2 micromol/plant) occurred at 50% flowering stage prior to the time of maximum biomass production, when GSL concentration was 1246.65 mumol/plant. Roots contributed <15% of the total GSL. The highest concentration of GSLs was in flowers at flowering stage, but due to the low biomass they contributed only 11.83% to the total GSL. On the basis of these results, wild radish should be incorporated into soil at 50% flowering to provide the most GSLs for weed suppression.
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Affiliation(s)
- Mayank S Malik
- Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Lake Alfred, Florida 33850, USA
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