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Wayment DG, Wright AA, Bergeron DR, McCollam GA, White PM. Soil dissipation and efficacy on itchgrass of soil-applied residual herbicides pendimethalin and clomazone in Louisiana sugarcane. PEST MANAGEMENT SCIENCE 2024. [PMID: 39344741 DOI: 10.1002/ps.8432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 08/07/2024] [Accepted: 09/08/2024] [Indexed: 10/01/2024]
Abstract
BACKGROUND Sugarcane (Saccharum sp.) growers in Louisiana report that the widely used soil residual herbicide, pendimethalin, is less effective at controlling itchgrass (Rottboellia chochinchinensis), possibly through accelerated dissipation from repeated applications. Some growers have started to use another herbicide, clomazone, in place of pendimethalin for itchgrass control when pendimethalin does not provide the necessary control. Little is known about the dissipation of these two herbicides, especially when applied together, in diverse sugarcane soils in Louisiana. Thus, the objective of the research was to measure the dissipation of pendimethalin and clomazone in soils having high itchgrass pressure. Soil samples from five fields were fortified (4 μg g-1) with clomazone and pendimethalin and monitored over the course of 163 days under laboratory conditions. Herbicide levels were determined by extracting the herbicides from soil with acetonitrile and analyzing the extracts with high performance liquid chromatography (HPLC). RESULTS The results indicate that clomazone is persistent in the soils studied, with a degradation half-life (DT50) of ≥79 days. Pendimethalin dissipates more rapidly in soil with a DT50 ranging from 7 to 59 days. All itchgrass plants showed injury to herbicide but many grew out of symptoms, and responses were not consistent between soil types. CONCLUSION Pendimethalin dissipation varied greatly between soil types, yet clomazone was generally persistent in each soil tested. However, when these soils were seeded with itchgrass, pendimethalin was more effective at controlling itchgrass than clomazone. Although persistent in the soils tested, the leaching potential of clomazone may limit its long-term effectiveness. Published 2024. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Darcey G Wayment
- Department of Chemistry and Physical Sciences, Nicholls State University, Thibodaux, LA, USA
| | - Alice A Wright
- US Department of Agriculture, Sugarcane Research Unit, Agricultural Research Service, Houma, LA, USA
| | - Dallas R Bergeron
- Department of Chemistry and Physical Sciences, Nicholls State University, Thibodaux, LA, USA
- US Department of Agriculture, Sugarcane Research Unit, Agricultural Research Service, Houma, LA, USA
| | - Gerald A McCollam
- US Department of Agriculture, Sugarcane Research Unit, Agricultural Research Service, Houma, LA, USA
| | - Paul M White
- US Department of Agriculture, Sugarcane Research Unit, Agricultural Research Service, Houma, LA, USA
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Brueck CL, Xin X, Lupolt SN, Kim BF, Santo RE, Lyu Q, Williams AJ, Nachman KE, Prasse C. (Non)targeted Chemical Analysis and Risk Assessment of Organic Contaminants in Darkibor Kale Grown at Rural and Urban Farms. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:3690-3701. [PMID: 38350027 PMCID: PMC11293618 DOI: 10.1021/acs.est.3c09106] [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] [Indexed: 02/15/2024]
Abstract
This study investigated the presence and human hazards associated with pesticides and other anthropogenic chemicals identified in kale grown in urban and rural environments. Pesticides and related compounds (i.e., surfactants and metabolites) in kale samples were evaluated using a nontargeted data acquisition for targeted analysis method which utilized a pesticide mixture containing >1,000 compounds for suspect screening and quantification. We modeled population-level exposures and assessed noncancer hazards to DEET, piperonyl butoxide, prometon, secbumeton, terbumeton, and spinosyn A using nationally representative estimates of kale consumption across life stages in the US. Our findings indicate even sensitive populations (e.g., pregnant women and children) are not likely to experience hazards from these select compounds were they to consume kale from this study. However, a strictly nontargeted chemical analytical approach identified a total of 1,822 features across all samples, and principal component analysis revealed that the kale chemical composition may have been impacted by agricultural growing practices and environmental factors. Confidence level 2 compounds that were ≥5 times more abundant in the urban samples than in rural samples (p < 0.05) included chemicals categorized as "flavoring and nutrients" and "surfactants" in the EPA's Chemicals and Products Database. Using the US-EPA's Cheminformatics Hazard Module, we identified that many of the nontarget compounds have predicted toxicity scores of "very high" for several end points related to human health. These aspects would have been overlooked using traditional targeted analysis methods, although more information is needed to ascertain whether the compounds identified through nontargeted analysis are of environmental or human health concern. As such, our approach enabled the identification of potentially hazardous compounds that, based on their hazard assessment score, merit follow-up investigations.
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Affiliation(s)
- Christopher L. Brueck
- Department of Environmental Health and Engineering, Johns Hopkins University, MD, USA
| | - Xiaoyue Xin
- Department of Environmental Health and Engineering, Johns Hopkins University, MD, USA
| | - Sara N. Lupolt
- Department of Environmental Health and Engineering, Johns Hopkins University, MD, USA
- Risk Sciences and Public Policy Institute, Johns Hopkins University, MD, USA
- Center for a Livable Future, Johns Hopkins University, MD, USA
| | - Brent F. Kim
- Department of Environmental Health and Engineering, Johns Hopkins University, MD, USA
- Center for a Livable Future, Johns Hopkins University, MD, USA
| | - Raychel E. Santo
- Department of Environmental Health and Engineering, Johns Hopkins University, MD, USA
- Center for a Livable Future, Johns Hopkins University, MD, USA
| | - Q. Lyu
- Department of Environmental Health and Engineering, Johns Hopkins University, MD, USA
| | - Antony J. Williams
- Center for Computational Toxicology and Exposure, Office of Research and Development, U.S. Environmental Protection Agency, NC, USA
| | - Keeve E. Nachman
- Department of Environmental Health and Engineering, Johns Hopkins University, MD, USA
- Risk Sciences and Public Policy Institute, Johns Hopkins University, MD, USA
- Center for a Livable Future, Johns Hopkins University, MD, USA
| | - Carsten Prasse
- Department of Environmental Health and Engineering, Johns Hopkins University, MD, USA
- Risk Sciences and Public Policy Institute, Johns Hopkins University, MD, USA
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Hazra DK, Mondal P, Purkait A, Mandal S, Bhattacharyya S, Karmakar R, Roy S, Banerjee T, Banerjee H. Determination of quizalofop-p-ethyl in onion: residual dissipation pattern, weed control efficiency, and food safety assessment under field conditions. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1067. [PMID: 37598129 DOI: 10.1007/s10661-023-11691-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 08/07/2023] [Indexed: 08/21/2023]
Abstract
Monitoring pesticide residue levels becomes crucial to maintain quality and guarantee food safety as the consumption of onion green leaves and immature and mature bulbs (either raw or processed) rises. A field experiment was conducted for two consecutive seasons with quizalofop-p-ethyl (5% EC) at 50 and 100 g a.i. ha-1 to evaluate weed control efficiency and to determine terminal residues. Post-emergence application of fop herbicide at 100 g a.i. ha-1 kept the weed density and dry weight reasonably at a lower level and enhanced the productivity of onion with higher economic returns. A rapid, sensitive, and analytical method was developed using high-performance liquid chromatography (HPLC) with excellent linearity (r2 > 0.99). The limit of quantification for quizalofop-p-ethyl was established at 0.04 mg kg-1 with signal to noise (S/N) ratio ≥ 10. The method was successfully applied and initial quantified residues were in the range of 2.5-4.4 mg kg-1 irrespective of seasons and doses. Finally, the presence of targeted herbicide residues in harvested samples was confirmed by liquid chromatography tandem mass spectrometry (LC-MS/MS) under optimized operating conditions. Dietary risk assessment assured harvested onions were safe for consumption at the recommended dose. It also can be concluded that quizalofop ethyl did not adversely influence soil micro-organisms at standard rates of application.
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Affiliation(s)
- Dipak Kumar Hazra
- Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, 741235, India
- All India Network Project on Pesticide Residues, Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, 741235, India
| | - Prithusayak Mondal
- Regional Research Station (Terai Zone), Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal, 736165, India.
| | - Aloke Purkait
- Department of Soil Science and Agricultural Chemistry, Palli-Siksha Bhavana (Institute of Agriculture), Visva - Bharati, Sriniketan, Bolpur, Birbhum, West Bengal, 731236, India
| | - Swagata Mandal
- All India Network Project on Pesticide Residues, Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, 741235, India
| | - Sudip Bhattacharyya
- All India Network Project on Pesticide Residues, Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, 741235, India
| | - Rajib Karmakar
- Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, 741235, India
- All India Network Project on Pesticide Residues, Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, 741235, India
| | - Sankhajit Roy
- Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, 741235, India
| | - Tirthankar Banerjee
- Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, LBS Building, Pusa Campus, New Delhi, 110012, India
| | - Hemanta Banerjee
- Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, 741235, India
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Zheng L, Seidi F, Liu Y, Wu W, Xiao H. Polymer-based and stimulus-responsive carriers for controlled release of agrochemicals. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Li C, Chen Z, Qin D, Liu R, Li L, Li W, He Y, Yuan L. Simultaneous determination of the herbicide bixlozone and its metabolites in plant and animal samples by liquid chromatography-tandem mass spectrometry. J Sep Sci 2021; 44:822-832. [PMID: 33289303 DOI: 10.1002/jssc.202000992] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 11/29/2020] [Accepted: 12/03/2020] [Indexed: 12/31/2022]
Abstract
Tracing the herbicide bixlozone and its metabolites in food is necessary to assess their risks to human health. In the study, a rapid and effective analytical method using the quick, easy, cheap, effective, rugged, and safe method for the simultaneous determination of bixlozone and its metabolites (2,4-dichlorobenzoic acid, 3-hydroxy-propanamide-bixlozone, and 5'-hydroxy-bixlozone) in plant and animal samples (tomato, cucumber, apple, wheat flour, meat, milk, and egg) was developed based on ultra high performance liquid chromatography-tandem mass spectrometry. The method was validated based on the linearity (R2 > 0.99), sensitivity (limit of quantification = 0.01 mg/kg), recovery (70.2-115.1%), and precision (intraday 1.2-17.6%, interday 0.3-16.0%). Detection was achieved within 6.0 min. The method is reliable for the determination of four target compounds in all seven matrices. The satisfactory validation criteria and successful application show that the proposed methodology is suitable for the detection of four target compounds in real matrices.
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Affiliation(s)
- Congdi Li
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Zenglong Chen
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, P. R. China
| | - Dongmei Qin
- Institute for the Control of Agrochemicals, Ministry of Agriculture and Rural Affairs, Beijing, P. R. China
| | - Rong Liu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Li Li
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, P. R. China
| | - Wei Li
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, P. R. China
| | - Yujian He
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Longfei Yuan
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, P. R. China
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