차응애 방제를 위한 Bifenazate와 Cyenopyrafen 액상수화제의 우엉의 잎과 뿌리 중 잔류변화 및 식이섭취 노출 안전성 평가 = Evaluations of Residual Dissipation and Dietary Exposure Safety of Miticidal Bifenazate and Cyenopyrafen as Suspension Concentration treated on burdock (Arctium lappa L.)

다국어 초록 (Multilingual Abstract)

Bifenazate and cyenopyrafen are known as active ingredients for tea spider mites (Te t r a n y c h u s kanzawai) but are not registered for burdock. In this study, we investigated the time-course residue dissipation and the residue safety of bifenazate and cyenopyrafen on burdock roots and leaves through an open-field trial. The 23.5% bifenazate (SC) and 25% cyenopyrafen (SC) were applied twice at 7-day intervals with 2000-fold diluted solutions. The residues of bifenazate and cyenopyrafen in burdock roots were not detected (<0.01 mg kg-1). Otherwise, the initial residue of total bifenazate in the leaves was 17.5 ± 0.56 mg kg-1, and it decreased to 0.893 ± 0.216 mg kg-1 on 21 days after treatment (DAT). The initial residue of cyenopyrafen in the leaves was 16.0 ± 1.09 mg kg-1 and decreased to 0.426 ± 0.061 mg kg-1 on 21 DAT. The calculated DT50s of bifenazate and cyenopyrafen in the leaves were 5.9 and 3.8 days, respectively.