کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4409956 | 1307519 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Pesticide residue dynamics in passion fruits: Comparing field trial and modelling results Pesticide residue dynamics in passion fruits: Comparing field trial and modelling results](/preview/png/4409956.png)
We evaluated the exposure to pesticides from the consumption of passion fruits and subsequent human health risks by combining several methods: (i) experimental field studies including the determination of pesticide residues in/on passion fruits, (ii) dynamic plant uptake modelling, and (iii) human health risk assessment concepts. Eight commonly used pesticides were applied onto passion fruits cultivated in Colombia. Pesticide concentrations were measured periodically (between application and harvest) in whole fruits and fruit pulp. Measured concentrations were compared with predicted residues calculated with a dynamic and crop-specific pesticide uptake model, namely dynamiCROP. The model accounts for the time between pesticide application and harvest, the time between harvest and consumption, the amount of spray deposition on plant surfaces, uptake processes, dilution due to crop growth, degradation in plant components, and reduction due to food processing (peeling). Measured and modelled residues correspond well (r2 = 0.88–0.99), with all predictions falling within the 90% confidence interval of the measured values. A mean error of 43% over all studied pesticides was observed between model estimates and measurements. The fraction of pesticide applied during cultivation that is eventually ingested by humans is on average 10−4–10−6, depending on the time period between application and ingestion and the processing step considered. Model calculations and intake fractions via fruit consumption based on experimental data corresponded well for all pesticides with a deviation of less than a factor of 2. Pesticide residues in fruits measured at recommended harvest dates were all below European Maximum Residue Limits (MRLs) and therefore do not indicate any violation of international regulatory thresholds.
► We model and measure pesticide plant uptake and translocation dynamics in passion fruit.
► Model calculations are compared to experimental field trial results.
► Ingestion after direct application is stressed as most important exposure route.
► Residue reduction potential of 85% due to peeling is shown.
► Pesticide selection and application schemes can be improved with the model.
Journal: Chemosphere - Volume 89, Issue 7, October 2012, Pages 850–855