Quantifying pesticide emission fractions for tropical conditions

Gentil-Sergent, Céline; Basset-Mens, Claudine; Gaab, Jens; Mottes, Charles; Melero, Carlos; Fantke, Peter

doi:10.1016/j.chemosphere.2021.130014

Cited by 25 publications

(16 citation statements)

References 47 publications

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“…Weather conditions such as temperature and humidity in the soil and air can affect the transpiration rate of plants, which determines the pesticide uptake rate by plants. 3 , 37 , 59 , 60 , 61 Moreover, different geographical regions always form different soil characteristics, including mineral contents, microorganisms, and physical properties, which can affect the horizontal or vertical distribution of pesticide residues in soil. 62 , 63 Thus, a comprehensive fate model that incorporates the distribution of pesticides in soil is required to obtain better estimates of BCFs, especially for some tubers that grow deeply underneath the soil.…”

Section: Resultsmentioning

confidence: 99%

“…Second, the weather and soil conditions are not considered in our model and may differ from those in the experimental study, which could significantly affect the fate of pesticides in soil and further impact the uptake of pesticides by potatoes. Weather conditions such as temperature and humidity in the soil and air can affect the transpiration rate of plants, which determines the pesticide uptake rate by plants 3,37,59–61 . Moreover, different geographical regions always form different soil characteristics, including mineral contents, microorganisms, and physical properties, which can affect the horizontal or vertical distribution of pesticide residues in soil 62,63 .…”

Section: Resultsmentioning

confidence: 99%

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Improved plant bioconcentration modeling of pesticides: The role of periderm dynamics

Fantke

2021

Pest Management Science

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BACKGROUND There is a continuous need to advance pesticide plant uptake models in support of improving pest control and reducing human exposure to pesticide residues. The periderm of harvested root and tuber crops may affect pesticide uptake, but is usually not considered in plant uptake models. To quantify the influence of the periderm on pesticide uptake from soil into potatoes, we propose a model that includes an explicit periderm compartment in the soil–plant mass balance for pesticides. RESULTS Our model shows that the potato periderm acts as an active barrier to the uptake of lipophilic pesticides with high KOW, while it lets more lipophobic pesticides accumulate in the medulla (pulp). We estimated bioconcentration factors (BCFs) for over 700 pesticides and proposed parameterizations for including the effects of the periderm into a full plant uptake modeling framework. A sensitivity analysis shows that both the degradation half‐life inside the tuber and the lipophilicity drive the contributions of other aspects to the variability of BCFs, while highlighting distinct dynamics in the periderm and medulla compartments. Finally, we compare model estimates with measured data, showing that predictions agree with field observations for current‐use pesticides and some legacy pesticides frequently found in potatoes. CONCLUSION Considering the periderm improves the accuracy of quantifying pesticide uptake and bioconcentration in potatoes as input for optimizing pest control and minimizing human exposure to pesticide residues in edible crops.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Improved plant bioconcentration modeling of pesticides: The role of periderm dynamics

Fantke

2021

Pest Management Science

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“…Many of the studies on pesticides in LCA focused on environmentally mediated exposure and thus fail to address pesticide exposures via food. The USEtox model version 2 and 3 (Fantke et al, 2021), as implemented in IMPACT World+, enables consideration of these residues based on the dynamiCrop model from Fantke, Friedrich and Jolliet (2012) and Fantke and Jolliet (2015), in a consistent way with environmental exposures, with exposure to chemicals in food contact materials and with exposures to other toxic chemicals emitted along the entire food life cycle.…”

Section: Impact Assessment Methodsmentioning

confidence: 99%

“…An ongoing challenge for LCA is to adequately capture these factors, both in the inventory and in the impact assessment. For example, recent studies have emphasized the differences between temperate and tropical applications due to differences in climate, soils and microbial activity (Gentil et al, 2020;Gentil-Sergent et al, 2021). PestLCI can inform such inventory, but it is restricted to a European context (Dijkman, Birkved and Hauschild, 2012), although it can be modified for other climates and soil types (Xue et al, 2015).…”

Section: Important Issues In the Assessment Of Food Itemsmentioning

confidence: 99%

Integration of environment and nutrition in life cycle assessment of food Items: opportunities and challenges

2021

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“…) f eff,cover for the tomato and grapevine scenarios, the variability of initial and secondary distribution fractions is presented in ) are detailed in Table 2. At initial distribution, the air-assisted sprayer in grapevine displays higher off-field surfaces emissions, = f 0.04 The differences of emission fractions to air and off-field surfaces are linked to the characteristics of the application method as discussed in Gentil-Sergent et al (2021). In the present case study, only agronomically relevant application methods were tested for each considered crop production system.…”

Section: Across a Range Of Effective Area Fractions Of Cover (mentioning

confidence: 97%

Introducing ground cover management in pesticide emission modeling

Gentil-Sergent

Basset-Mens

Renaud-Gentié

et al. 2021

Integr Envir Assess & Manag

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Ground cover management (GCM) is an important agricultural practice used to reduce weed growth, erosion and runoff, and improve soil fertility. In the present study, an approach to account for GCM is proposed in the modeling of pesticide emissions to evaluate the environmental sustainability of agricultural practices. As starting point, we include a cover crop compartment into the mass balance of calculating initial (within minutes after application) and secondary (including additional processes) pesticide emission fractions. The following parameters were considered: (i) cover crop occupation between the rows of main field crops, (ii) cover crop canopy density, and (iii) cover crop family. Two modalities of cover crop occupation and cover crop canopy density were tested for two crop growth stages, using scenarios without cover crops as control. From that, emission fractions and related ecotoxicity impacts were estimated for pesticides applied to tomato in Martinique and to grapevine in the Loire Valley (France). Our results show that the presence of a cover crop decreased on average the pesticide emission fraction reaching field soil by a factor of 3 compared to bare soil, independently of field crop and its growth stage, and cover crop occupation and density.When considering cover exported from the field, ecotoxicity impacts were reduced by around 65% and 90% compared to bare soil, respectively for grapevine and tomato, regardless of the emission distribution used. Since additional processes may influence emission distributions under GCM, such as run-off, leaching or preferential flow, further research is required to incorporate these processes consistently in our proposed GCM approach.

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Quantifying pesticide emission fractions for tropical conditions

Cited by 25 publications

References 47 publications

Improved plant bioconcentration modeling of pesticides: The role of periderm dynamics

Improved plant bioconcentration modeling of pesticides: The role of periderm dynamics

Integration of environment and nutrition in life cycle assessment of food Items: opportunities and challenges

Introducing ground cover management in pesticide emission modeling

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