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사토양와 양토 재배 후작물 중 Diquat dibromide의 약해와 전이
조일규 ( Il Kyu Cho ),양해룡 ( Hae-Ryong Yang ),설재웅 ( Jae Ung Seol ),오영곤 ( Young Goun Oh ),이동기 ( Dong-gi Lee ),김지명 ( Ji Myung Kim ),김원일 ( Won-il Kim ) 한국환경농학회 2021 한국환경농학회 학술대회집 Vol.2021 No.-
Diquat dibromide (1,1’-ethylene-2,2’-bipyridyldiylium dibromide) is known as a fast-acting nonselective herbicide and plant growth regulator. This agrochemical causes injury to the parts of the plant to which it is applied. However, it may be fatal to humans if swallowed and inhaled even though it is used to desiccate potato vines and seed crops. This study was carried out to understand the safety of the following crops such as pepper, radish, lettuce and corn through phytotoxicity and residual evaluation in the unintentional contamination of the higher residual diquat dibromide. The diquat dibromide was analyzed by using the LC-TriQ-MS/MS. The diquat dibromide was determined after 30 days of crop cultivation in soil which had been applied with 35 and 90 mg/kg of diquat dibromide. The diquat dibromide remained 26.3∼28.1 and 70.9∼75.8 mg/kg at the 35 mg/kg and 90 mg/kg of diquat dibromide-treated soil, respectively. This result indicated that diquat dibromide did not convert to other metabolites and resided mostly in the soil during crop cultivation even though it was partially decomposed. In addition, the diquat dibromide were found around 0.01 mg/kg and below the detection of limit (0.01 mg/kg) in the 47 day-elapsed pepper and radish as well as 30 day-elapsed lettuce and corn cultivating in sandy loam and loam soil which were treated with 90 mg/kg of diquat dibromide.