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Odemer R, Friedrich E, Illies I, Berg S, Pistorius J, Bischoff G. Potential Risk of Residues From Neonicotinoid-Treated Sugar Beet Flowering Weeds to Honey Bees (Apis mellifera L.). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2023; 42:1167-1177. [PMID: 36861216 DOI: 10.1002/etc.5602] [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: 10/07/2022] [Revised: 12/20/2022] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
In 2018 the European Union (EU) banned the three neonicotinoid insecticides imidacloprid, clothianidin (CLO), and thiamethoxam (TMX), but they can still be used if an EU Member State issues an emergency approval. Such an approval went into effect in 2021 for TMX-coated sugar beet seeds in Germany. Usually, this crop is harvested before flowering without exposing non-target organisms to the active ingredient or its metabolites. In addition to the approval, strict mitigation measures were imposed by the EU and the German federal states. One of the measures was to monitor the drilling of sugar beet and its impact on the environment. Hence we took residue samples from different bee and plant matrices and at different dates to fully map beet growth in the German states of Lower Saxony, Bavaria, and Baden-Württemberg. A total of four treated and three untreated plots were surveyed, resulting in 189 samples. Residue data were evaluated using the US Environmental Protection Agency BeeREX model to assess acute and chronic risk to honey bees from the samples, because oral toxicity data are widely available for both TMX and CLO. Within treated plots, we found no residues either in pools of nectar and honey crop samples (n = 24) or dead bee samples (n = 21). Although 13% of beebread and pollen samples and 88% of weed and sugar beet shoot samples were positive, the BeeREX model found no evidence of acute or chronic risk. We also detected neonicotinoid residues in the nesting material of the solitary bee Osmia bicornis, probably from contaminated soil of a treated plot. All control plots were free of residues. Currently, there are insufficient data on wild bee species to allow for an individual risk assessment. In terms of the future use of these highly potent insecticides, therefore, it must be ensured that all regulatory requirements are complied with to mitigate any unintentional exposure. Environ Toxicol Chem 2023;42:1167-1177. © 2023 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Richard Odemer
- Institute for Bee Protection, Julius Kühn-Institut-Federal Research Centre for Cultivated Plants, Braunschweig, Germany
| | - Elsa Friedrich
- Apicultural State Institute, University of Hohenheim, Stuttgart, Germany
| | - Ingrid Illies
- Institute for Bee Research and Beekeeping, Bavarian State Institute for Viticulture and Horticulture, Veitshöchheim, Germany
| | - Stefan Berg
- Institute for Bee Research and Beekeeping, Bavarian State Institute for Viticulture and Horticulture, Veitshöchheim, Germany
| | - Jens Pistorius
- Institute for Bee Protection, Julius Kühn-Institut-Federal Research Centre for Cultivated Plants, Braunschweig, Germany
| | - Gabriela Bischoff
- Institute for Bee Protection, Julius Kühn-Institut-Federal Research Centre for Cultivated Plants, Berlin, Germany
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Gioia RR, Fernandes JO, Bernardino CAR, Mahler CF, Braz BF, Lopes CSC, Archanjo BS, Ribeiro ES, D'Elia E, Santelli RE, Cincotto FH. An electrochemical sensor-based carbon black associated with a modified mixed oxide (SiO 2/TiO 2/Sb 2O 5) for direct determination of thiamethoxam in raw honey and water samples. Mikrochim Acta 2022; 189:307. [PMID: 35917034 DOI: 10.1007/s00604-022-05412-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 07/08/2022] [Indexed: 11/26/2022]
Abstract
The study aimed to develop an electrochemical sensor based on glassy carbon, mixed oxide (SiO2/TiO2/Sb2O5), and carbon black. The material was synthesized, characterized, and used to determine thiamethoxam in raw honey and water. The morphologic structure and electrochemical performance of the sensor was characterized by scanning electron microscopy and cyclic voltammetry. Differential pulse voltammetry with a concentration of 0.1 mol L-1 of Britton-Robinson buffer at pH 7.0 allowed the generation of a method to determine thiamethoxam in a linear range of 0.25 to 100.5 μmol L-1 and with a limit of detection of 0.012 μmol L-1. The system efficiently quantified traces of thiamethoxam in raw honey and tap water samples. The modified sensor did not present interferences of K+, Na+, Ca2+, Mg2+, glyphosate, imidacloprid, and carbendazim. In addition, the device showed good recovery values for thiamethoxam when applied directly to honey and water samples without any treatment, presenting an electrochemical sensor to monitor real-time hazardous substances in environmental and food matrices.
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Affiliation(s)
- Raísa Rodrigues Gioia
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Julia Oliveira Fernandes
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Claudio Fernando Mahler
- Departamento de Engenharia Civil, COPPE, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bernardo Ferreira Braz
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Braulio Soares Archanjo
- Instituto Nacional de Metrologia, Qualidade E Tecnologia, Inmetro-Xerém, Duque de Caxias, Brasil
| | - Emerson Schwingel Ribeiro
- Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
- Avaliação Toxicológica E Remoção de Micropoluentes E Radioativos (INCT-DATREM), Instituto de Química, Unesp, Instituto Nacional de Tecnologias Alternativas Para Detecção, Araraquara (SP), Brazil
| | - Eliane D'Elia
- Departamento de Química Inorgânica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
- Avaliação Toxicológica E Remoção de Micropoluentes E Radioativos (INCT-DATREM), Instituto de Química, Unesp, Instituto Nacional de Tecnologias Alternativas Para Detecção, Araraquara (SP), Brazil
| | - Ricardo Erthal Santelli
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
- National Institute of Science & Technology of Bioanalytics (INCTBio), Campinas, Brazil
| | - Fernando Henrique Cincotto
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil.
- National Institute of Science & Technology of Bioanalytics (INCTBio), Campinas, Brazil.
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García-Valcárcel AI, Campos-Rivela JM, Hernando Guil MD, Martínez-Ferrer MT. Neonicotinoid contamination in wildflowers collected from citrus orchards in a northwestern Mediterranean Region (Spain) after tree foliar treatments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:53482-53495. [PMID: 35288853 PMCID: PMC9343284 DOI: 10.1007/s11356-022-19331-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 02/17/2022] [Indexed: 06/14/2023]
Abstract
Ground-cover vegetation attracts and harbors beneficial insects to the agrosystem, playing an important role in conservation biological control. Integrated pest management (IPM) program guidelines recommend the implantation of sowed or resident wild covers in perennial crops. Given the high-quality fruit requirements, even in IPM programs, insecticides can be required in citrus crops. This study presents, over a year, the levels of neonicotinoids (thiamethoxam and imidacloprid) in not-target ground-cover wildflowers growing spontaneously in citrus orchards after foliar treatment of citrus trees. The presence and persistence of these neonicotinoids in different wildflower species were studied. Concentrations of thiamethoxam and imidacloprid in whole wildflowers ranged from < method quantification limit (MQL) to 52.9 ng g-1 and from < MQL to 98.6 ng g-1, respectively. Thiamethoxam was more frequently detected than imidacloprid. Thiamethoxam and imidacloprid were detected up to 336 and 230 days after treatment, respectively. The highest detection frequencies (100%) and highest thiamethoxam and imidacloprid mean concentrations (26.0 ± 7.3 ng g-1 and 11.0 ± 10.6 ng g-1, respectively) occurred in wildflowers collected 9 days after the treatments. Since application, a clear decrease in the concentration of both compounds and differences in the accumulation depending on wildflower species were observed. Cross contamination was detected, indicating a transport from adjacent treated plots. Maintaining a cover crop in citrus orchards may lead to detrimental effects on non-target arthropods if these neonicotinoid compounds are used for pest control since they can entail a chronic exposure during at least 230 days for imidacloprid and 336 days for thiamethoxam.
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Affiliation(s)
- Ana Isabel García-Valcárcel
- Department of Environment and Agronomy, National Institute for Agricultural and Food Research and Technology - INIA-CSIC, Ctra. La Coruña Km. 7.5, 28040, Madrid, Spain.
| | | | - María Dolores Hernando Guil
- Department of Environment and Agronomy, National Institute for Agricultural and Food Research and Technology - INIA-CSIC, Ctra. La Coruña Km. 7.5, 28040, Madrid, Spain
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Zhang D, Lu S. Human exposure to neonicotinoids and the associated health risks: A review. ENVIRONMENT INTERNATIONAL 2022; 163:107201. [PMID: 35344909 DOI: 10.1016/j.envint.2022.107201] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 03/08/2022] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
Neonicotinoids (NEOs) are a class of broad-spectrum insecticides dominant in the global market. They were distributed extensively in the environment and occurred frequently in humans. Potential health effects of NEOs, such as neurological toxicity and diabetes to non-targeted mammals, have raised concerns. This review summarizes analytical methods of NEOs in human samples, their internal exposure levels and composition profiles in urine, blood, hair, breast milk, saliva and tooth samples with global comparisons, and daily NEOs exposure dose and relative health risks.Urinary NEOs levels in Asian populations were substantially higher than those in the U.S. and Europe, which may be due to different dietary patterns and insecticide applications across regions. N-desmethyl acetamiprid, 5-hydroxy-imidacloprid and olefin-imidacloprid were dominant among detected NEOs. NEO metabolites exhibited higher detection frequencies and levels than their parent compounds in humans, while investigations on NEO metabolites remain much limited. Current exposure assessments mainly focused on short-term urine analysis, while biomaterials for long-term monitoring, such as hair, nail and other alternatives, should also be considered. Large-scale epidemiological studies are critically needed to elucidate potential health outcomes associated with NEOs exposure.
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Affiliation(s)
- Duo Zhang
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 510275, China
| | - Shaoyou Lu
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 510275, China.
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Thompson H, Vaughan S, Mahlein A, Ladewig E, Kenter C. Is there a risk to honeybees from use of thiamethoxam as a sugar beet seed treatment? INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2022; 18:709-721. [PMID: 34292667 PMCID: PMC9290588 DOI: 10.1002/ieam.4498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/04/2021] [Accepted: 07/20/2021] [Indexed: 05/04/2023]
Abstract
The ban imposed by the European Union on the use of neonicotinoids as sugar beet seed treatments was based on the exposure of bees to residues of neonicotinoids in pollen and nectar of succeeding crops. To address this concern, residues of thiamethoxam (TMX) and clothianidin (CTD) were analyzed in soil collected from fields planted in at least the previous year with thiamethoxam-treated sugar beet seed. This soil monitoring program was conducted at 94 sites across Germany in two separate years. In addition, a succeeding crop study assessed residues in soil, guttation fluid, pollen, and nectar sampled from untreated succeeding crops planted in the season after thiamethoxam seed-treated sugar beet at eight field sites across five countries. The overall mean residues observed in soil monitoring were 8.0 ± 0.5 µg TMX + CTD/kg in the season after the use of treated sugar beet seed. Residue values decreased with increasing time interval between the latest thiamethoxam or clothianidin application before sugar beet drilling and with lower application frequency. Residues were detected in guttation fluid (2.0-37.7 µg TMX/L); however, the risk to pollinators from this route of exposure is likely to be low, based on the reported levels of consumption. Residues of thiamethoxam and clothianidin in pollen and nectar sampled from the succeeding crops were detected at or below the limit of quantification (0.5-1 µg a.i./kg) in 86.7% of pollen and 98.6% of nectar samples and, unlike guttation fluid residues, were not correlated with measured soil residues. Residues in pollen and nectar are lower than reported sublethal adverse effect concentrations in studies with honeybee and bumble bee individuals and colonies fed only thiamethoxam-treated sucrose, and are lower than those reported to result in no effects in honeybees, bumble bees, and solitary bees foraging on seed-treated crops. Integr Environ Assess Manag 2022;18:709-721. © 2021 SYNGENTA. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).
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Affiliation(s)
- Helen Thompson
- Syngenta, Jealott's Hill International Research StationBerkshireUK
| | - Sarah Vaughan
- Syngenta, Jealott's Hill International Research StationBerkshireUK
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Ecotoxicological Studies on the Action of Actara 25 WG Insecticide on Prussian Carp (Carassius gibelio) and Marsh Frog (Pelophylax ridibundus). TOXICS 2022; 10:toxics10030114. [PMID: 35324739 PMCID: PMC8949032 DOI: 10.3390/toxics10030114] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/20/2022] [Accepted: 02/25/2022] [Indexed: 02/05/2023]
Abstract
The toxic action of the Actara 25 WG insecticide (it contains 25% thiamethoxam as an active substance) in non-lethal doses was studied in two species of aquatic organisms—the Prussian carp (Carassius gibelio) and the marsh frog (Pelophylax ridibundus)—at two thermal levels, 6–8 °C (low temperature) and 18–20 °C (room temperature), respectively. In the Prussian carp, we recorded decreases in oxygen consumption and stimulation of the respiratory rhythm, changes that were more pronounced in the case of intoxicated fish and when the species were kept at room temperature. The histopathology of the lung in the frog illustrated the thickening of the conjunctival septum, an increase in the number of mucous cells, and an increase in the ratio between the diameter of the nucleus and the diameter of the pneumocyte. All of these changes were more pronounced in the animals kept at higher temperature. Our study looks at the extent to which temperature changes can influence the ability of poikilothermic organisms to withstand the presence of toxic substances in the environment as a result of the impact of the use of insecticides in agriculture. The two tested organisms are a common presence for the study area, which was affected in the last decade by climate change.
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Lasheras RJ, Lázaro R, Burillo JC, Bayarri S. Occurrence of Pesticide Residues in Spanish Honey Measured by QuEChERS Method Followed by Liquid and Gas Chromatography-Tandem Mass Spectrometry. Foods 2021; 10:foods10102262. [PMID: 34681314 PMCID: PMC8534991 DOI: 10.3390/foods10102262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/16/2021] [Accepted: 09/17/2021] [Indexed: 11/22/2022] Open
Abstract
In the current study, the QuEChERS extraction method with slight modifications, followed by liquid and gas chromatography–tandem mass spectrometry, was applied for the determination of 399 pesticide residues in 91 raw honey samples from northeastern Spain. The quality control procedure established in Document No. SANTE/12682/2019 was successfully followed: the responses in reagent blank and blank honey samples were below 30% of the reporting limit (0.01 mg kg−1) for all analysed compounds, the correlation coefficients (R2) were higher than 0.99 in most calibration curves, the deviation of back-calculated concentration from the true concentration was below ±20% (using the standard of 50 μg L−1 concentration), and the recoveries of spiked samples on matrix were within the range of 70–120% for almost all analytes. Only chlorfenvinphos (2–7.8 ng/g) and coumaphos (8.8–37 ng/g) were detected in 13 samples, and neither were observed to exceed their maximum residue limits (MRLs). Dietary risk assessment for pesticide residues in honey above their lowest calibrated level (LCL) was performed, and two different age groups, adults and infants, were considered as populations at risk. The contribution of honey lay far below the acceptable daily intake (ADI) for both pesticide residues. Therefore, according to our results, honey is unlikely to pose concerns for consumer health in terms of its contribution to dietary long-term exposure. However, to maintain the level of compliance, pesticide residues in honey should be continuously monitored.
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Affiliation(s)
- Roberto Jesús Lasheras
- Laboratorio Agroambiental, Unidad Técnica de Residuos Fitosanitarios, Gobierno de Aragón, Avenida de Montañana 1005, 50071 Zaragoza, Spain; (R.J.L.); (J.C.B.)
| | - Regina Lázaro
- Instituto Agroalimentario de Aragón—IA2, Veterinary Faculty, Universidad de Zaragoza—CITA, 50013 Zaragoza, Spain;
- Correspondence:
| | - Juan Carlos Burillo
- Laboratorio Agroambiental, Unidad Técnica de Residuos Fitosanitarios, Gobierno de Aragón, Avenida de Montañana 1005, 50071 Zaragoza, Spain; (R.J.L.); (J.C.B.)
| | - Susana Bayarri
- Instituto Agroalimentario de Aragón—IA2, Veterinary Faculty, Universidad de Zaragoza—CITA, 50013 Zaragoza, Spain;
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Anastassiadou M, Arena M, Auteri D, Brancato A, Bura L, Carrasco Cabrera L, Chaideftou E, Chiusolo A, Court Marques D, Crivellente F, De Lentdecker C, Egsmose M, Fait G, Greco L, Ippolito A, Istace F, Jarrah S, Kardassi D, Leuschner R, Lostia A, Lythgo C, Magrans O, Mangas I, Miron I, Molnar T, Padovani L, Parra Morte JM, Pedersen R, Reich H, Santos M, Serafimova R, Sharp R, Stanek A, Sturma J, Szentes C, Terron A, Tiramani M, Vagenende B, Villamar‐Bouza L. Peer review of the pesticide risk assessment for the active substance sulfoxaflor in light of confirmatory data submitted. EFSA J 2020; 18:e06056. [PMID: 32874268 PMCID: PMC7448090 DOI: 10.2903/j.efsa.2020.6056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The conclusions of EFSA following the peer review of the initial risk assessment carried out by the competent authority of the co-rapporteur Member State, the Czech Republic, for the pesticide active substance sulfoxaflor are reported. The context of the peer review was that requested by the European Commission following the submission and evaluation of confirmatory ecotoxicology data. The conclusions were reached on the basis of the evaluation of the representative uses of sulfoxaflor as an insecticide on fruiting vegetables (field and greenhouse application), cucurbits (field and greenhouse application), spring and winter cereals (field application) and cotton (field application). The reliable endpoints concluded as being appropriate for use in regulatory risk assessment, derived from the available studies and literature in the dossier peer reviewed, are presented. For the field and non-permanent structure greenhouses, a high risk to honeybees and bumble bees was identified related to some pertinent scenarios (treated crop scenario except after flowering period, weed scenario, field margin scenario). A low risk was concluded for honeybees, bumble bees and solitary bees in case of permanent structure greenhouse provided the low exposure in such scenarios. The European Commission mandated EFSA to complete the assessment of the spray drift reducing measures necessary to protect bumblebees and solitary bees in field margins from exposure to sulfoxaflor and to complete the assessment of the risk to bees from puddle water.
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Devos Y, Craig W, Devlin RH, Ippolito A, Leggatt RA, Romeis J, Shaw R, Svendsen C, Topping CJ. Using problem formulation for fit-for-purpose pre-market environmental risk assessments of regulated stressors. EFSA J 2019; 17:e170708. [PMID: 32626445 PMCID: PMC7055725 DOI: 10.2903/j.efsa.2019.e170708] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Pre‐market/prospective environmental risk assessments (ERAs) contribute to risk analyses performed to facilitate decisions about the market introduction of regulated stressors. Robust ERAs begin with an explicit problem formulation, which involves among other steps: (1) formally devising plausible pathways to harm that describe how the deployment of a regulated stressor could be harmful; (2) formulating risk hypotheses about the likelihood and severity of such events; (3) identifying the information that will be useful to test the risk hypotheses; and (4) developing a plan to acquire new data for hypothesis testing should tests with existing information be insufficient for decision‐making. Here, we apply problem formulation to the assessment of possible adverse effects of RNA interference‐based insecticidal genetically modified (GM) plants, GM growth hormone coho salmon, gene drive‐modified mosquitoes and classical biological weed control agents on non‐target organisms in a prospective manner, and of neonicotinoid insecticides on bees in a retrospective manner. In addition, specific considerations for the problem formulation for the ERA of nanomaterials and for landscape‐scale population‐level ERAs are given. We argue that applying problem formulation to ERA maximises the usefulness of ERA studies for decision‐making, through an iterative process, because: (1) harm is defined explicitly from the start; (2) the construction of risk hypotheses is guided by policy rather than an exhaustive attempt to address any possible differences; (3) existing information is used effectively; (4) new data are collected with a clear purpose; (5) risk is characterised against well‐defined criteria of hypothesis corroboration or falsification; and (6) risk assessment conclusions can be communicated clearly. However, problem formulation is still often hindered by the absence of clear policy goals and decision‐making criteria (e.g. definition of protection goals and what constitutes harm) that are needed to guide the interpretation of scientific information. We therefore advocate further dialogue between risk assessors and risk managers to clarify how ERAs can address policy goals and decision‐making criteria. Ideally, this dialogue should take place for all classes of regulated stressors, as this can promote alignment and consistency on the desired level of protection and maximum tolerable impacts across regulated stressors.
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Affiliation(s)
- Yann Devos
- GMO Unit European Food Safety Authority (EFSA) Italy
| | - Wendy Craig
- Biosafety Group International Centre for Genetic Engineering & Biotechnology (ICGEB) Italy
| | | | | | | | - Jörg Romeis
- Research Division Agroecology and Environment Agroscope Switzerland
| | - Richard Shaw
- Centre for Agriculture and Biosciences International (CABI) United Kingdom
| | - Claus Svendsen
- Ecotoxicology and Chemical Risk Group United Kingdom Research and Innovation Centre for Ecology and Hydrology (CEH) United Kingdom
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