Residue behavior and risk assessment of afidopyropen and its metabolite M440I007 in tea

Food Chem. 2023 Mar 15;404(Pt A):134413. doi: 10.1016/j.foodchem.2022.134413. Epub 2022 Sep 28.

Abstract

Afidopyropen, a novel insecticide, is highly effective against piercing insects such as the tea leafhopper. The residual levels of afidopyropen and M440I007 in tea cultivation, processing, and brewing were studied. During tea cultivation, afidopyropen dissipated faster in fresh tea shoots in the rainy season (T1/2 of 1.2-2.5 d) than that in the dry season (T1/2 of 3.1-4.4 d); afidopyropen was metabolized into M440I007, the level of which peaked in 1 d, and degraded rapidly (over 90 %) afterward 3 d. The green tea processing steps had little effect on decreasing the afidopyropen residue (PF of 0.90-1.18). Low infusion rates of afidopyropen (16.7 %-17.7 %) and M440I007 (4.1 %-6.2 %) were observed from dry green tea to infusion; furthermore, the risk of ingesting afidopyropen from drinking tea was low, with the risk quotient values < 0.0001. This study can offer guidance on the rational application of afidopyropen in tea plants.

Keywords: Afidopyropen; Infusion; M440I007; Processing; Residue; Tea.

MeSH terms

  • Camellia sinensis* / metabolism
  • Heterocyclic Compounds, 4 or More Rings / analysis
  • Heterocyclic Compounds, 4 or More Rings / metabolism
  • Lactones / analysis
  • Pesticide Residues* / analysis
  • Risk Assessment
  • Tea / chemistry

Substances

  • afidopyropen
  • Heterocyclic Compounds, 4 or More Rings
  • Lactones
  • Tea
  • Pesticide Residues