Dynamics and dietary risk assessment of thiamethoxam in wheat, lettuce and tomato using field experiments and computational simulation

Nannan Pang, Xueqi Fan, Peter Fantke, Shengming Zhao, Jiye Hu*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Thiamethoxam is a widely used pesticide applied to different field crops. To inform risk assessment for this pesticide across relevant crops, we usually rely on field trials, which require time, cost and energy. For providing reliable data across crops and reduce experimental efforts, field trials should be complemented with dynamic modelling. In the present work, we hence focused on combining field trials with dynamic modelling to simulate mass evolutions of the pesticide-plant-system for thiamethoxam applied to wheat, lettuce and tomato as three major food crops. Field trials were conducted with QuEChERS (quick, easy, cheap, effective, rugged and safe) liquid chromatography-mass spectrometry, which gave consistent maximum residue concentrations for thiamethoxam in wheat, lettuce and tomato. We used these residues to evaluate the related dietary risk of humans consuming these food crops. Our results indicated that thiamethoxam did not provide any unacceptable dietary risk for humans across these three food crops, which was in line with other studies. Results for the studied crops could be extrapolated to other crops and with that, our study constituted a cost- and time-efficient way of providing reliable input for risk assessment of pesticides across crops, which was relevant for both practitioners and regulators.
Original languageEnglish
Article number113285
JournalEnvironmental Pollution
Volume256
Number of pages8
ISSN0269-7491
DOIs
Publication statusPublished - 2020

Keywords

  • Dietary risk assessment
  • DynamCROP
  • Liquid chromatography mass spectrometry
  • Pesticide residues
  • Thiamethoxam

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