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Qiu H, Sun C, Dormatey R, Bai J, Bi Z, Liu Y, Liu Z, Wei J, Mao S, Yao P. Thiamethoxam Application Improves Yield and Drought Resistance of Potatoes ( Solanum tuberosum L.). PLANTS (BASEL, SWITZERLAND) 2024; 13:477. [PMID: 38498458 PMCID: PMC10891895 DOI: 10.3390/plants13040477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 02/01/2024] [Accepted: 02/03/2024] [Indexed: 03/20/2024]
Abstract
(1) Background: Potato is the most important tuber crop in the world that can contribute to food security. However, the crop has been shown to be sensitive to drought and its yields decline significantly during successive periods of stress. Drought triggers a number of responses in potato, ranging from physiological changes to fluctuations in growth rates and yields. In light of global climate change, it is important to understand the effects of thiamethoxam on potato growth and yield under drought conditions. (2) Methods: The objective was to evaluate the impact of thiamethoxam on improving drought resistance and yield of potato under drought conditions. The drought-tolerant and sensitive-genotypes Qingshu No. 9 and Atlantic were used for a two-year pot experiment. Potato seeds were coated with 70% thiamethoxam before sowing (treatment group (T)), with a control group without treatment (NT). Two experimental treatments were applied: normal irrigation (ND) and drought stress (D). (3) Results: The results showed that root length, plant yield, chlorophyll content and superoxide dismutase (SOD) activity significantly increased under both genotypes, while malondialdehyde (MDA) and proline (Pro) content were reduced under thiamethoxam under drought stress. The best indicators were obtained in the comprehensive evaluation for the T-D treatment, suggesting that the application of thiamethoxam under drought stress was more effective than normal irrigation. (4) Conclusions: Our results suggest that the application of thiamethoxam improves potato growth, thereby increasing drought tolerance and potato yield. However, thiamethoxam is a neonicotinoid pesticide, and the limitation of this study is that it did not explore the ecological effects of thiamethoxam, which need to be systematically studied in the future. Moreover, considering the potential risks of thiamethoxam to the environment, specific agronomic measures to effectively degrade thiamethoxam residue should be taken when it is applied in agricultural production.
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Affiliation(s)
- Hailong Qiu
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
| | - Chao Sun
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
| | - Richard Dormatey
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
- CSIR-Crops Research Institute, P.O. Box 3785, Kumasi 00233, Ghana
| | - Jiangping Bai
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
| | - Zhenzhen Bi
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
| | - Yuhui Liu
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
| | - Zhen Liu
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
| | - Jingui Wei
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
| | - Shoufa Mao
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
| | - Panfeng Yao
- State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (H.Q.); (C.S.); (R.D.); (J.B.); (Z.B.); (Y.L.); (Z.L.); (J.W.); (S.M.)
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Wei J, Wang X, Tu C, Long T, Bu Y, Wang H, Jeyakumar P, Jiang J, Deng S. Remediation technologies for neonicotinoids in contaminated environments: Current state and future prospects. ENVIRONMENT INTERNATIONAL 2023; 178:108044. [PMID: 37364306 DOI: 10.1016/j.envint.2023.108044] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/05/2023] [Accepted: 06/13/2023] [Indexed: 06/28/2023]
Abstract
Neonicotinoids (NEOs) are synthetic insecticides with broad-spectrum insecticidal activity and outstanding efficacy. However, their extensive use and persistence in the environment have resulted in the accumulation and biomagnification of NEOs, posing significant risks to non-target organisms and humans. This review provides a summary of research history, advancements, and highlighted topics in NEOs remediation technologies and mechanisms. Various remediation approaches have been developed, including physiochemical, microbial, and phytoremediation, with microbial and physicochemical remediation being the most extensively studied. Recent advances in physiochemical remediation have led to the development of innovative adsorbents, photocatalysts, and optimized treatment processes. High-efficiency degrading strains with well-characterized metabolic pathways have been successfully isolated and cultured for microbial remediation, while many plant species have shown great potential for phytoremediation. However, significant challenges and gaps remain in this field. Future research should prioritize isolating, domesticating or engineering high efficiency, broad-spectrum microbial strains for NEO degradation, as well as developing synergistic remediation techniques to enhance removal efficiency on multiple NEOs with varying concentrations in different environmental media. Furthermore, a shift from pipe-end treatment to pollution prevention strategies is needed, including the development of green and economically efficient alternatives such as biological insecticides. Integrated remediation technologies and case-specific strategies that can be applied to practical remediation projects need to be developed, along with clarifying NEO degradation mechanisms to improve remediation efficiency. The successful implementation of these strategies will help reduce the negative impact of NEOs on the environment and human health.
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Affiliation(s)
- Jing Wei
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China; Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, Guangdong Technology and Equipment Research Center for Soil and Water Pollution Control, Zhaoqing University, Zhaoqing 526061, Guangdong, China
| | - Xiaoyu Wang
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China; School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China
| | - Chen Tu
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing 210008, China.
| | - Tao Long
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China
| | - Yuanqing Bu
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China
| | - Hailong Wang
- Biochar Engineering Technology Research Center of Guangdong Province, School of Environment and Chemical Engineering, Foshan University, Foshan 528000, Guangdong, China
| | - Paramsothy Jeyakumar
- Environmental Sciences Group, School of Agriculture and Environment, Massey University, Palmerston North 4442, New Zealand
| | - Jinlin Jiang
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China
| | - Shaopo Deng
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China.
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Huang Y, Zhang B, Xue J, Lan B, Guo Y, Xu L, Zhang T. A Pilot Nationwide Survey on the Concentrations of Neonicotinoids and Their Metabolites in Indoor Dust from China: Application for Human Exposure. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 109:900-909. [PMID: 35980462 DOI: 10.1007/s00128-022-03600-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
The present study assessed the residue levels of six parent neonicotinoids (p-NEOs) and four metabolites (m-NEOs) in indoor dust collected from 12 cities of China. Acetamiprid (ACE) and imidacloprid (IMI) were the predominated p-NEOs (detection rates: 98%) with the median values at 4.54 and 7.48 ng/g dry weight (dw), respectively. N-demethyl-acetamiprid (N-dm-ACE) was the most important m-NEO with the median value at 0.69 ng/g dw, while other m-NEOs were rarely detected (detection rates: < 15%). Significant correlation between ACE and thiacloprid (THD) was observed (p < 0.01), indicating their probably concurrent applications. ACE was significantly correlated to N-dm-ACE (p < 0.01), implicating the degradation of ACE in indoor environment. The estimated daily intake (EDIing) of NEOs via dust ingestion were far lower than the acceptable daily intake for NEOs. To our knowledge, this study provided a baseline nationwide investigation on the occurrence of NEOs in indoor dust of China.
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Affiliation(s)
- Yingyan Huang
- School of Environmental Science and Engineering, Sun Yat-Sen University, 510275, Guangzhou, China
| | - Bo Zhang
- School of Environmental Science and Engineering, Sun Yat-Sen University, 510275, Guangzhou, China
| | - Jingchuan Xue
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, 510006, Guangzhou, China
| | - Bang Lan
- School of Chemistry and Environment, Jiaying University, 514015, Mei Zhou, China
- Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas, 514015, Mei Zhou, China
| | - Yuankai Guo
- School of Chemistry and Environment, Jiaying University, 514015, Mei Zhou, China
- Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas, 514015, Mei Zhou, China
| | - Liangzheng Xu
- Guangdong Pomelo Engineering Technology Development Center, Jiaying University, 514015, Meizhou, China
| | - Tao Zhang
- School of Environmental Science and Engineering, Sun Yat-Sen University, 510275, Guangzhou, China.
- Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas, 514015, Mei Zhou, China.
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Zou Z, Huang X, Guo X, Jia C, Li B, Zhao E, Wu J. Efficient degradation of imidacloprid in soil by thermally activated persulfate process: Performance, kinetics, and mechanisms. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 241:113815. [PMID: 36068744 DOI: 10.1016/j.ecoenv.2022.113815] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 06/11/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
Imidacloprid (IMI) as a first-generation commercial neonicotinoid has been frequently detected in the environment in recent years. In this study, the efficient degradation of IMI in soil by a thermally activated persulfate (PS) process was investigated. The degradation efficiencies of IMI were in the range of 82-97% with the PS dosage of 10 mM, when the initial concentrations of IMI were 5-50 mg/kg in the soil. Degradation of the IMI was fitted with a pseudo-first-order kinetic model under different reaction temperatures. Inhibition effects of the common inorganic anions on the IMI degradation in the system followed the order Cl- > HCO3- > H2PO4- > NO3-. Soil pH and soil organic matter were also main factors affecting the degradation of IMI. The degradation efficiencies (64-97%) of three other typical neonicotinoids (acetamiprid, clothianidin, and dinotefuran) indicated that the thermally activated persulfate process could be used for remediation of neonicotinoid-contaminated soil. Quenching experiments indicated that the major reactive species in IMI degradation were SO4•-, O2•-, and •OH. Six degradation intermediates of IMI were inferred in the soil, and degradation pathways of IMI included hydroxylation, denitrification, C-N bond break and further oxidation.
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Affiliation(s)
- Ziyu Zou
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China; College of Agricultural Sciences, Jiangxi Agricultural University, Nanchang 330045, China
| | - Xin Huang
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Xingle Guo
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Chunhong Jia
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Baotong Li
- College of Agricultural Sciences, Jiangxi Agricultural University, Nanchang 330045, China
| | - Ercheng Zhao
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Junxue Wu
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China.
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5
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Dissipation Behavior and Acute Dietary Risk Assessment of Thiamethoxam and Its Metabolite Clothianidin on Spinach. Molecules 2022; 27:molecules27072209. [PMID: 35408608 PMCID: PMC9000691 DOI: 10.3390/molecules27072209] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/16/2022] [Accepted: 03/25/2022] [Indexed: 02/04/2023] Open
Abstract
Thiamethoxam and its metabolite clothianidin residues pose a potential threat to human health. This study aims to investigate the residue behavior and acute dietary risk assessment of thiamethoxam and clothianidin on spinach. Thiamethoxam and clothianidin were extracted using a quick, easy, cheap, effective, rugged, safe (QuEChERS) method and analyzed using liquid chromatography-tandem mass spectrometry (LC-MS/MS). At spike levels from 0.01 to 5 mg kg−1, the average recoveries of both analytes were in the range of 94.5−105.5%, with relative standard deviations (RSDs) of 3.8−10.9%. The dissipation behavior of thiamethoxam followed first-order kinetics, with half-lives of ≤1.6 days. Clothianidin appeared readily as a plant metabolite with highest level exhibited during 3 to 5 days after application. Temperature and light may be two main factors for degradation of thiamethoxam. Besides, acute risk assessment of thiamethoxam and clothianidin was evaluated with risk quotients (RQs) <100%, which suggested a low health risk for all consumer groups of Chinese residents.
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Peres FSC, Petter FA, Sinhorin AP, de Lima LB, Tavanti TR, da Silva Freddi O, Marimon Junior BH. Influence of biochar on the sorption and leaching of thiamethoxan in soil. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:153-163. [PMID: 35275045 DOI: 10.1080/03601234.2022.2050126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This study evaluated the long-term effect of biochar application on the sorption and desorption of thiamethoxam in a Haplic Plinthosol. The experiment was conducted in a randomized block design with combination of doses of mineral fertilizer NPK (0 and 300 kg·ha-1 formula 05-25-15) and biochar (0, 16 and 32 Mg ha-1). Deformed soil samples were collected in the field from the 0-0.10 m layer of all plots to determine the sorption and desorption of the thiamethoxam insecticide in the soil; fulvic acid (FA), humic acid (AH) and humin (HUM) carbon contents; and total organic carbon. The Batch slurry method was used to evaluate sorption and desorption. The Freundlich isotherm adequately described thiamethoxam sorption in all treatments. The application of biochar increased the sorption (Kfs) and decreased the desorption (Kfd) of thiamethoxam. The sorption intensity (1/n) showed reduction characteristics as the soil concentration of thiamethoxam increased. Biochar has a sorption effect on the soil through covalent bonds and H-bonds with the insecticide molecules, thereby indirectly increasing the sorption potential in the chemical fractions of the organic matter of soil. The application of 32 Mg ha-1 of biochar significantly reduced thiamethoxam in the soil solution. Altogether, the present study reveals that biochar application in soil is a promising tool for mitigating the contaminant potential of thiamethoxam in subsurface waters.
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Affiliation(s)
- Fernanda Salles Cunha Peres
- Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brazil
| | - Fabiano André Petter
- Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brazil
| | - Adilson Paulo Sinhorin
- Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brazil
| | - Larissa Borges de Lima
- Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brazil
| | - Tauan Rimoldi Tavanti
- Departamento de Fitossanidade, Engenharia Rural e Solos, Universidade Estadual Paulista, São Paulo, Brazil
| | - Onã da Silva Freddi
- Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brazil
| | - Ben Hur Marimon Junior
- Ecologia e Conservação, Universidade do Estado de Mato Grosso, Nova Xavantina, Mato Grosso, Brazil
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Pearsons KA, Rowen EK, Elkin KR, Wickings K, Smith RG, Tooker JF. Small-Grain Cover Crops Have Limited Effect on Neonicotinoid Contamination from Seed Coatings. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:4679-4687. [PMID: 33749272 DOI: 10.1021/acs.est.0c05547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Neonicotinoids from insecticidal seed coatings can contaminate soil in treated fields and adjacent areas, posing a potential risk to nontarget organisms and ecological function. To determine if cover crops can mitigate neonicotinoid contamination in treated and adjacent areas, we measured neonicotinoid concentrations for three years in no-till corn-soybean rotations, planted with or without neonicotinoid seed coatings, and with or without small grain cover crops. Although neonicotinoids were detected in cover crops, high early season dissipation provided little opportunity for winter-planted cover crops to absorb significant neonicotinoid residues; small grain cover crops failed to mitigated neonicotinoid contamination in either treated or untreated plots. As the majority of neonicotinoids from seed coatings dissipated shortly after planting, residues did not accumulate in soil, but persisted at concentrations below 5 ppb. Persistent residues could be attributed to historic neonicotinoid use and recent, nearby neonicotinoid use. Tracking neonicotinoid concentrations over time revealed a large amount of local interplot movement of neonicotinoids; in untreated plots, contamination was higher when plots were less isolated from treated plots.
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Affiliation(s)
- Kirsten A Pearsons
- Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Elizabeth K Rowen
- Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Kyle R Elkin
- United States Department of Agriculture-Agricultural Research Service, Pasture Systems and Watershed Management Research Unit, University Park, Pennsylvania 16802, United States
| | - Kyle Wickings
- Department of Entomology, Cornell University, Cornell AgriTech, Geneva, New York 14456, United States
| | - Richard G Smith
- Department of Natural Resources and the Environment, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - John F Tooker
- Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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8
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Voigt M, Jaeger M. Structure and QSAR analysis of photoinduced transformation products of neonicotinoids from EU watchlist for ecotoxicological assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 751:141634. [PMID: 32882550 DOI: 10.1016/j.scitotenv.2020.141634] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/06/2020] [Accepted: 08/09/2020] [Indexed: 06/11/2023]
Abstract
Current research is increasingly focusing on the ecotoxicity of anthropogenic micro-pollutants and their degradation and transformation products resulting from biological and chemical treatment processes. These products enter the aquatic environment through various routes and may endanger aquatic organisms and plants. In this study, five neonicotinoids from the EU watchlist and their degradation products induced by UVC irradiation were examined. All identified photoinduced degradation or transformation products were subsequently submitted to Quantitative Structure Activity (QSAR) analysis. Among the investigated structures, 15 substances already identified in previous studies and eleven new transformation products were analyzed. By using QSAR analysis, it became possible to predict ecotoxicity of individual substances with mere computational effort. Starting from the chemical structure, lower toxicity against green algae and invertebrates was predicted for the transformation products in general. For other aquatic target organisms, such as branchiopoda, actinopterygii and fathead minnow, the residual hazardous effect as compared to the initial compound depends on the presence of specific structural elements. For the neonicotinoids investigated, the cleavage or elimination of the nitrile or nitro group through the degradation process, was predicted to increase toxicity.
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Affiliation(s)
- Melanie Voigt
- Niederrhein University of Applied Sciences, Department of Chemistry and ILOC, Frankenring 20, D-47798 Krefeld, Germany
| | - Martin Jaeger
- Niederrhein University of Applied Sciences, Department of Chemistry and ILOC, Frankenring 20, D-47798 Krefeld, Germany.
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9
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Li S, Chen H, Wang X, Dong X, Huang Y, Guo D. Catalytic degradation of clothianidin with graphene/TiO 2 using a dielectric barrier discharge (DBD) plasma system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:29599-29611. [PMID: 32445149 DOI: 10.1007/s11356-020-09303-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
Clothianidin served as the model pollutant to investigate the performance and mechanism of pollutant removal by dielectric barrier discharge plasma (DBD) combined with the titanium dioxide-reduced graphene oxide (rGO-TiO2) composite catalyst. In this study, different ratios of titanium dioxide-graphene catalysts were loaded onto honeycomb ceramic plates via the sol-gel method, and the modified catalytic ceramic plates were characterized by XRD, SEM, FTIR, DRS, and energy dispersive X-ray. The results suggested that the rGO-TiO2 was well loaded on the surface of the honeycomb ceramic plates. According to the results of the characterization experiments and the degradation of the clothianidin solution with different proportions of the catalyst, 8 wt% rGO-TiO2 was selected as the optimum ratio for degradation. Clothianidin degradation efficiency was significantly influenced by input power, clothianidin concentration, pH value, liquid conductivity, free radical quencher. Finally, six degradation products of clothianidin were identified by HPLC-MS, and the possible transformation pathways of clothianidin degradation were identified. Graphical abstract.
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Affiliation(s)
- Shanping Li
- School of Environmental Science and Engineering, Shandong University, 72 Binhailu, Qingdao, 266237, China.
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Qingdao, 266237, China.
| | - Hao Chen
- School of Environmental Science and Engineering, Shandong University, 72 Binhailu, Qingdao, 266237, China
| | - Xiaoping Wang
- School of Environmental Science and Engineering, Shandong University, 72 Binhailu, Qingdao, 266237, China
| | - Xiaochun Dong
- School of Environmental Science and Engineering, Shandong University, 72 Binhailu, Qingdao, 266237, China
| | - Yixuan Huang
- School of Environmental Science and Engineering, Shandong University, 72 Binhailu, Qingdao, 266237, China
| | - Dan Guo
- School of Environmental Science and Engineering, Shandong University, 72 Binhailu, Qingdao, 266237, China
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10
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Lennon RJ, Peach WJ, Dunn JC, Shore RF, Pereira MG, Sleep D, Dodd S, Wheatley CJ, Arnold KE, Brown CD. From seeds to plasma: Confirmed exposure of multiple farmland bird species to clothianidin during sowing of winter cereals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 723:138056. [PMID: 32224397 DOI: 10.1016/j.scitotenv.2020.138056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 06/10/2023]
Abstract
Neonicotinoids are the largest group of systemic insecticides worldwide and are most commonly applied as agricultural seed treatments. However, little is known about the extent to which farmland birds are exposed to these compounds during standard agricultural practices. This study uses winter cereal, treated with the neonicotinoid clothianidin, as a test system to examine patterns of exposure in farmland birds during a typical sowing period. The availability of neonicotinoid-treated seed was recorded post-sowing at 39 fields (25 farms), and camera traps were used to monitor seed consumption by wild birds in situ. The concentration of clothianidin in treated seeds and crop seedlings was measured via liquid chromatography-tandem mass spectrometry, and avian blood samples were collected from 11 species of farmland bird from a further six capture sites to quantify the prevalence and level of clothianidin exposure associated with seed treatments. Neonicotinoid-treated seeds were found on the soil surface at all but one of the fields surveyed at an average density of 2.8 seeds/m2. The concentration of clothianidin in seeds varied around the target application rate, whilst crop seedlings contained on average 5.9% of the clothianidin measured in seeds. Exposure was confirmed in 32% of bird species observed in treated fields and 50% of individual birds post-sowing; the median concentration recorded in positive samples was 12 ng/mL. Results here provide clear evidence that a variety of farmland birds are subject to neonicotinoid exposure following normal agricultural sowing of neonicotinoid-treated cereal seed. Furthermore, the widespread availability of seeds at the soil surface was identified as a primary source of exposure. Overall, these data are likely to have global implications for bird species and current agricultural policies where neonicotinoids are in use, and may be pertinent to any future risk assessments for systemic insecticide seed treatments.
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Affiliation(s)
- Rosie J Lennon
- Department of Environment and Geography, The University of York, Heslington, York, United Kingdom.
| | - Will J Peach
- Royal Society for the Protection of Birds, Sandy, Bedfordshire, United Kingdom
| | - Jenny C Dunn
- School of Life Sciences, Joseph Banks Laboratories, The University of Lincoln, Lincoln, United Kingdom
| | - Richard F Shore
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, United Kingdom
| | - M Glória Pereira
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, United Kingdom
| | - Darren Sleep
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, United Kingdom
| | - Steve Dodd
- Royal Society for the Protection of Birds, Sandy, Bedfordshire, United Kingdom
| | - Christopher J Wheatley
- Department of Environment and Geography, The University of York, Heslington, York, United Kingdom; Department of Biology, The University of York, Heslington, York, United Kingdom
| | - Kathryn E Arnold
- Department of Environment and Geography, The University of York, Heslington, York, United Kingdom
| | - Colin D Brown
- Department of Environment and Geography, The University of York, Heslington, York, United Kingdom
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de Lima e Silva C, de Rooij W, Verweij RA, van Gestel CA. Toxicity in Neonicotinoids to Folsima candida and Eisenia andrei. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:548-555. [PMID: 31726476 PMCID: PMC7064934 DOI: 10.1002/etc.4634] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/19/2019] [Accepted: 11/07/2019] [Indexed: 05/27/2023]
Abstract
We compared the toxicity of the neonicotinoids imidacloprid, thiacloprid, thiamethoxam, acetamiprid, and clothianidin in terms of the survival and reproduction of 2 species of soil invertebrates, Folsomia candida and Eisenia andrei. Tests were performed using LUFA 2.2 natural soil, following standard protocols aimed at answering 2 questions: 1) Is there a difference in the toxicity between pure compound and its formulation? and 2) Is there a difference in the sensitivity of the species exposed to the same compound? For E. andrei, formulations and pure compounds had similar toxicity to both endpoints tested. For F. candida, acetamiprid and imidacloprid had different toxicities, with acetamiprid being 4 times more toxic to survival (median lethal concentration [LC50] 0.12 mg active substance [a.s.]/kg dry soil) and imidacloprid being 4 times more toxic to reproduction of the springtail (median effect concentration [EC50] 0.25 mg a.s./kg dry soil) than their commercial formulations. The most toxic compound to E. andrei was acetamiprid (LC50 0.80 and EC50 0.35-0.40 mg a.s./kg), and the most toxic to F. candida was clothianidin (LC50 0.07 and EC50 0.05 mg a.s./kg). Estimated risk ratios indicated that only one application/yr of clothianidin in the formulation Poncho® may pose a threat to the populations of springtails and earthworms. Environ Toxicol Chem 2020;39:548-555. © 2019 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals, Inc. on behalf of SETAC.
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DiBartolomeis M, Kegley S, Mineau P, Radford R, Klein K. An assessment of acute insecticide toxicity loading (AITL) of chemical pesticides used on agricultural land in the United States. PLoS One 2019; 14:e0220029. [PMID: 31386666 PMCID: PMC6684040 DOI: 10.1371/journal.pone.0220029] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 07/08/2019] [Indexed: 12/12/2022] Open
Abstract
We present a method for calculating the Acute Insecticide Toxicity Loading (AITL) on US agricultural lands and surrounding areas and an assessment of the changes in AITL from 1992 through 2014. The AITL method accounts for the total mass of insecticides used in the US, acute toxicity to insects using honey bee contact and oral LD50 as reference values for arthropod toxicity, and the environmental persistence of the pesticides. This screening analysis shows that the types of synthetic insecticides applied to agricultural lands have fundamentally shifted over the last two decades from predominantly organophosphorus and N-methyl carbamate pesticides to a mix dominated by neonicotinoids and pyrethroids. The neonicotinoids are generally applied to US agricultural land at lower application rates per acre; however, they are considerably more toxic to insects and generally persist longer in the environment. We found a 48- and 4-fold increase in AITL from 1992 to 2014 for oral and contact toxicity, respectively. Neonicotinoids are primarily responsible for this increase, representing between 61 to nearly 99 percent of the total toxicity loading in 2014. The crops most responsible for the increase in AITL are corn and soybeans, with particularly large increases in relative soybean contributions to AITL between 2010 and 2014. Oral exposures are of potentially greater concern because of the relatively higher toxicity (low LD50s) and greater likelihood of exposure from residues in pollen, nectar, guttation water, and other environmental media. Using AITL to assess oral toxicity by class of pesticide, the neonicotinoids accounted for nearly 92 percent of total AITL from 1992 to 2014. Chlorpyrifos, the fifth most widely used insecticide during this time contributed just 1.4 percent of total AITL based on oral LD50s. Although we use some simplifying assumptions, our screening analysis demonstrates an increase in pesticide toxicity loading over the past 26 years, which potentially threatens the health of honey bees and other pollinators and may contribute to declines in beneficial insect populations as well as insectivorous birds and other insect consumers.
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Affiliation(s)
| | - Susan Kegley
- Pesticide Research Institute, Inc., Santa Rosa, California, United States of America
| | - Pierre Mineau
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | - Rosemarie Radford
- Pesticide Research Institute, Inc., Santa Rosa, California, United States of America
| | - Kendra Klein
- Friends of the Earth US, Berkeley, California, United States of America
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