Development and application of a numerical dynamic model for pesticide residues in apple orchards

An, Quanshun; Wu, Yangliu; Li, Dong; Hao, Xiaolong; Pan, Canping; Rein, Arno

doi:10.1002/ps.6897

Cited by 19 publications

(18 citation statements)

References 68 publications

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“…In real-world scenarios, however, the plant growth dynamics, particularly in the early growth stage, can significantly impact the uptake or elimination kinetics of pesticide residues in plant tissues, leading to inaccurate predictions of residue levels in plant tissues. 8,13,47 Consequently, we enhanced the geocarpic model by taking into account the dynamic growth of the peanut plant (i.e. the growing plant mass following a logistic growth and dynamic transpiration are included., as detailed in Methods S6), that can be represented as follows:…”

Section: Improved Geocarpic Fruit Models 261 Considering Plant Growth...mentioning

confidence: 99%

“…59 For other types of plants with complex structures (such as trees and wheats), however, a multiplecompartment plant uptake model that accounts for the inter-compartment transfer of pesticide residues is necessary. 5,8,9,12,13,60 To enhance the efficiency of the geocarpic fruit model, we advocate including plant growth dynamics, partitioning processes of ionizable or polar chemicals, multiple compartments, and spatiotemporal factors (e.g. climate factors, shown in Fig.…”

Section: Ruds Of Pesticides At Harvest For Scenarios 1 Andmentioning

confidence: 99%

“…Coupling plant growth dynamics with plant uptake models involves diverse analytical or numerical model approaches (such as matrix algebra) to simulate pesticide residues in growing plant tissues during the whole plant growth cycle. 6,8,9,13…”

Section: Ruds Of Pesticides At Harvest For Scenarios 1 Andmentioning

confidence: 99%

“…Furthermore, based on plant physiology and topology, multicompartment, and dynamic uptake models were developed to simulate contaminant residues in aboveground plant tissues, which enrich model selection for predicting residue levels in common plants. [5][6][7][8] In addition, Fantke et al 9 introduced a first-order kinetics-based matrix (DynamiCrop) to comprehensively analyze the uptake, distribution, bioaccumulation, and dissipation of pesticide residues in parts of plants, namely, roots, stems, fruits, and leaves. DynamiCrop considers multiple residue uptake pathways, namely, soil, air, and plant surface, thereby enabling residue modeling in plants for real-world scenarios, an exercise that provides residue estimates in edible parts of crops at harvest.…”

Section: Introductionmentioning

confidence: 99%

“…This one‐compartment concept laid the foundation for many other modeling studies because of its simplicity and effectiveness. Furthermore, based on plant physiology and topology, multi‐compartment, and dynamic uptake models were developed to simulate contaminant residues in aboveground plant tissues, which enrich model selection for predicting residue levels in common plants 5–8 . In addition, Fantke et al 9 .…”

Section: Introductionmentioning

confidence: 99%

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Modeling pesticide residue uptake by leguminous plants: a geocarpic fruit model for peanuts

2022

Pest Management Science

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BACKGROUND: Pesticide residues are frequently found in leguminous plants; however, no modeling approaches predict residue concentrations in edible legume seeds. In this study, a geocarpic fruit model, simplified for neutral organic compounds, was proposed for high-throughput simulations (over 700 pesticides) of the residue uptake by peanut plants, which characterized three scenarios, namely (i) pesticide foliar application during the pre-seed development stage, (ii) foliar application during the seed development stage, and (iii) soil contamination before plant germination.RESULTS: In the foliar application scenario, in general, lipophilic pesticides have high simulated residue unit doses (RUDs, residue concentrationsinplantsper 1.0kg ha −1 of pesticide application) in peanutleavesowing tointensifieduptake via surface deposition,whereas hydrophilic pesticides have high simulated RUDs in peanuts because the uptake of residues via diffusion is enhanced. For the soilcontamination scenario, organic compounds with moderate lipophilicity have a high bioconcentration potential (i.e. the soil-plant system) in leaves and peanuts, due to large transpiration stream concentration factors (TSCFs) that boost the uptake via transpiration. CONCLUSIONS:The simulation results have some degrees of agreement with field measurements, indicating that the proposed model can be used as a screening tool for dietary risk assessment of pesticides in peanuts. In future research, pH-dependent physicochemical properties (e.g. soil-water partition coefficient and TSCF) and degradation rate constants of chemicals need to be refined to improve the simulation analysis.

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Section: Improved Geocarpic Fruit Models 261 Considering Plant Growth...mentioning

confidence: 99%

Section: Ruds Of Pesticides At Harvest For Scenarios 1 Andmentioning

confidence: 99%

Section: Ruds Of Pesticides At Harvest For Scenarios 1 Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling pesticide residue uptake by leguminous plants: a geocarpic fruit model for peanuts

2022

Pest Management Science

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Residues determination, risk assessment, and dissipation behavior of myclobutanil formulation on apple

Amin,

Sheikh,

Jan

et al. 2024

Biomedical Chromatography

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This study aimed to investigate the dissipation pattern, risk assessment, and waiting period of myclobutanil on apple fruit (Malus domestica Borkh.) under temperate conditions in Kashmir, India. The study involved the application of myclobutanil 10 WP at a single recommended dosage (125 g a.i. ha−1) and double dosage (250 g a.i. ha−1) on Red Velox apple trees, 2 months before harvest. GC equipped with an electron capture detector was used to analyze myclobutanil residues in fruit samples. The study revealed that myclobutanil, at both recommended and double recommended doses, dissipated rapidly and became nondetectable after 55 and 60 days, respectively. The waiting period for myclobutanil application was determined to be 12.41 days for the single dose and 25.58 days for the double dose, respectively. These waiting periods were based on the maximum residue limit of 0.6 ppm as prescribed by the Codex Alimentarius Commission, Food Safety and Standards Authority of India, and European Commission. The study concludes that myclobutanil 10 WP is safe for consumers at both recommended and double recommended doses when applied 2 months before harvest. Risk assessment, considering the average daily apple consumption in India and theoretical maximum residue contributions (TMRCs), indicates negligible health hazards even at double the recommended dosage. The calculated TMRC values at Day 0 were significantly below the maximum permissible intake. For average and maximum myclobutanil residues at single and double doses, the TMRC values were found to be 0.0069 and 0.0070 mg day−1 person−1 and 0.0105 and 0.0106 mg day−1 person−1, respectively. These results indicate that myclobutanil, when used according to recommended dosages and waiting periods, poses minimal health risks to consumers. The study emphasizes the importance of prudent fungicide use to minimize fungicide residues on fruits, thereby ensuring their safety for consumption.

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Generic Model for Plant Uptake of Ionizable Pharmaceuticals and Personal Care Products

Trapp

Shi

Zeng

2023

Enviro Toxic and Chemistry

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Plant uptake of pharmaceuticals and personal care products (PPCPs) has been recognized as a potential path to human exposure. Most existing regressions and uptake models are limited to neutral organic compounds, but 80% of pharmaceuticals and an unknown number of personal care products ionize under environmentally relevant conditions. A widely used generic plant uptake model was expanded step‐by‐step with processes relevant for weak and strong acids and bases, such as ionization, membrane permeability, ion trap, phloem transport, and sorption to proteins. The differential equation system was solved analytically, and the equations were implemented in a spreadsheet version. The changes in predicted plant uptake of neutral substances, acids, and bases were found for a range of key input data (log KOW, pKa, pH, sorption to proteins). For neutral compounds, sorption to proteins and phloem transport are of relevance only for the more polar compounds (low log KOW, ≤2). Weak acids (pKa ≤6) are trapped in phloem due to pH‐related effects, and in roots when pH in soil is low (pH 4–5). Cations sorb stronger and hence show less bioavailability and less translocation than anions. Sorption to proteins reduces translocation to leaves and fruits for all substances, but this is more evident for polar and ionic compounds that have negligible sorption to lipids. The new generic model considers additional processes that are of relevance for polar and ionizable substances. It might be used instead of existing standard approaches for chemical risk assessment and assessment of the environmental fate of PPCPs. Environ Toxicol Chem 2023;42:793–804. © 2023 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.

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Development and application of a numerical dynamic model for pesticide residues in apple orchards

Cited by 19 publications

References 68 publications

Modeling pesticide residue uptake by leguminous plants: a geocarpic fruit model for peanuts

Modeling pesticide residue uptake by leguminous plants: a geocarpic fruit model for peanuts

Residues determination, risk assessment, and dissipation behavior of myclobutanil formulation on apple

Generic Model for Plant Uptake of Ionizable Pharmaceuticals and Personal Care Products

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