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Uptake and Carry-over of Procymidone Applied on Preceding Crop to Non-target Succeeding Crop
Se-Yeon Kwak,Sang-Hyeob Lee,Dong-Ju Lee,Ye-Jin Heo,Jae-Won Choi,Ji-Eun Oh,Hyo-Young Kim,Byung-Gon Shin,Jang-Eok Kim 한국농약과학회 2021 한국농약과학회 학술발표대회 논문집 Vol.2021 No.11
Pesticides can persist in soil due to multi-annual uses. To decrease the critical barrier for positive list system(PLS) for potential carry-over of such residues to non-target succeeding crop from applied on preceding crop during rotation cultivation, an uptake study of procymidone was conducted under the actual cultivation conditions in Korea. Procymidone was sprayed twice by foliar application with recommended and double dose according to the safe use guidelines for Korean cabbage up to 14 days before harvest. Arable land was kept fallow for 4 days after harvesting Korean cabbage, spinach was cultivated as a succeeding crop. Initial residues in soil were 5.670-14.175mg/kg and that degraded to 3.098-4.555mg/kg until harvest of Korean cabbage, and then persisted 1.026-1.300mg/kg by spinach harvest. Procymidone residues in edible part of succeeding crops from soil uptake were range of 0.020-0.048mg/kg for recommended dose and 0.055-0.116mg/kg for double dose. Root concentration factor(RCF) values of procymidone at different concentration ranged 0.053-0.123, and translocation factor(TF) was ranged 0.176-0.768 for spinach. The value of TF was higher than RCF indicating the capability of translocation to shoot is relatively higher than that of root uptake and accumulation. Procymidone applied on Korean cabbage can be carried-over to spinach and detected at a level similar to MRL(0.05Tmg/kg). Therefore, this study recommended to follow-up study for establishment of plant back interval(PBI) of succeeding crops reflecting the actual agricultural conditions as this study.