올리브 작물 특성에 따른 살균제 Thiophanate-methyl과 Pyribencarb의 감소 경향 분석 및 위해성 평가

Abstract

In this study, the residual characteristics and half-lives of thiophanate-methyl and pyribencarb were compared after treatment on olives, followed by a risk assessment. Total residual levels of the two pesticides ranged between 2.43–5.57 mg/kg and 1.65–6.52 mg/kg, respectively, with half-lives of 25.7 days and 13.1 days. Compared to previous studies, the longer half-lives of thiophanate-methyl and pyribencarb in olives can be attributed to the differences in cuticle wax content. The composition and content of cuticle wax differ depending on the crop cultivar, influencing the adsorption and dissipation of pesticides. Because of wax on the crop surface, the half-life of pesticides can be extended, suggesting a correlation between the surface characteristics of olives and the half-lives of pesticides. The risk assessment, based on the worst-case scenario (99th percentile consumer group for olive consumption), resulted in Hazard Index (HI) values of 0.032 and 0.077, indicating low risk (HI < 1).