The dislodgeable foliar residue (DFR) is the amount of pesticide that exists on foliage after the pesticide has dried and which could dislodge to the skin or clothes of workers and is a key parameter for non-dietary risk assessments required to demonstrate safe use for pesticide registration. DFR data in the literature are described as insufficiently reliable, limited, and encompasses considerable statistical uncertainties. The purpose of this article is to describe a newly developed laboratory method for the quantification of DFR with an illustrative example. The laboratory method reflected available field DFR methodology but involved controlled application of droplets to leaves and validation of the wash-off process used to remove the residue from the leaf surface before the analytical quantification. A very high level of accuracy (99.7-102.1%) and precision (±1.5%) was achieved. Residue data generated from the illustrated application of the method showed a robust normal distribution, unlike field studies. The method is deemed to be controllable, cost-efficient, and time-saving, taking hours rather than days. This enables the generation of more data to allow extrapolation between the generated data by investigating multiple factors that may influence DFR. An improved understanding of DFR could save time, money, and resources.

Original languageEnglish
Pages (from-to)1070-1080
Number of pages11
JournalAnnals of work exposure and health
Issue number8
Early online date29 Jun 2022
Publication statusPublished - 11 Oct 2022


  • Pesticide residue
  • Pesticide analysis
  • agricultural policy
  • Risk
  • DFR
  • pesticides
  • pesticide residue analysis
  • dislodgeable foliar residue
  • non-dietary risk assessment
  • worker exposure
  • pesticide risk assessment


Dive into the research topics of 'Development of a New Dislodgeable Foliar Residue Analytical Laboratory Method for Pesticides'. Together they form a unique fingerprint.

Cite this