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차응애 방제를 위한 Bifenazate와 Cyenopyrafen 액상수화제의 우엉의 잎과 뿌리 중 잔류변화 및 식이섭취 노출 안전성 평가
오경열,이득영,서성준,강상우,김진성,김영진,김진효 한국농약과학회 2023 농약과학회지 Vol.27 No.2
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.