Translocation, subcellular distribution, and safety assessment of chlorfenapyr (CFP) and its metabolite tralopyril (TLP) in soil-cultivated cherry radish.

Chlorfenapyr is a frequently used insecticide in vegetables, and understanding its translocation and distribution are important for determining the residues and dietary safety in these crops. In this paper, we studied the translocation, subcellular distribution, and dissipation of chlorfenapyr and tralopyril in soil-cultivated cherry radish. Both upward and downward translocations were observed for the analytes, although the extent was limited, as indicated by the bioconcentration and translocation factors (both <1). The analytes were primarily accumulated in the cell walls. Chlorfenapyr dissipated rapidly with half-lives of 5.90-7.10 d. Tralopyril can prolonged the dissipation rate of chlorfenapyr due to the total chlorfenapyr's half-lives of 7.20-9.46 d. The dietary risk for consumers can be neglected, when the sampling interval was 10 d. This study provided additional information on the translocation, distribution, and application method of chlorfenapyr in cherry radish and assessed the potential threats of chlorfenapyr to human health.