Assessing pesticide residue and spray deposition in greenhouse eggplant canopies to improve residue analysis

Qingjun Wu, Dengke Hua, Xiaobin Zheng, Kun Zhang, Zhen Zhang, Yanran Wan, Xuguo Zhou, Youjun Zhang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Pesticide residue analysis is critically important for ensuring food safety and regulating international trade. In a greenhouse setting, we assessed pesticide residue and exposure patterns using liquid chromatography-mass spectrometry and Allura Red tracer analysis. Our results show significant effects of eggplant canopy position and spray concentration on deposition parameters. Specifically, spray coverage, spray density, deposition, and residue were generally greater for leaves in the higher canopy. Deposition and residue, unlike spray coverage and spray density, linearly correlated with spray concentration. Pesticide residues on leaves linearly correlated with depositions on artificial targets, and a correction factor was constructed to estimate residues from tracer depositions. This comparative analysis suggests that tracer analysis using Allura Red in combination with artificial targets is a time- and cost-saving alternative to conventional residue analysis for assessing spray parameters under high-volume spraying scenarios. A better understanding of pesticide residue and spray patterns will not only enhance the safety of our food supply chain but also improve pest control efficacy within the sustainable integrated pest management framework.

Original languageEnglish
Pages (from-to)11920-11927
Number of pages8
JournalJournal of Agricultural and Food Chemistry
Issue number43
StatePublished - Oct 28 2020

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society.


  • Abamectin
  • Manual air-pressure knapsack sprayer
  • Pesticide residue
  • Pesticide spray pattern

ASJC Scopus subject areas

  • General Chemistry
  • General Agricultural and Biological Sciences


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