Residues and dissipation kinetics of triazole fungicides difenoconazole and propiconazole in wheat and soil in Chinese fields

•Simultaneously determining difenoconazole and propiconazole in wheat and soil.•Half-lives in ecosystem were relatively short, ca. 3–9days.•The residues in wheat grain were below 0.01mg/kg based on use labels.•The residues in wheat are safe per established MRL’s. An analytical method for simultaneously determining the residues of difenoconazole and propiconazole in wheat straw, wheat grain and soil was developed. Mean recoveries and relative standard deviations in all samples ranged 86.2–101.3% and 3.1–12.1% for propiconazole and difenoconazole. The half-lives of difenoconazole and propiconazole were 3.6–5.5days and 5.1–6.9days in wheat straws, and 4.9–5.8days and 6.1–8.4days in soil, respectively. The residues in wheat grain were found to be