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Translocation of Tolclofos-methyl from Ginseng Cultivated Soil to Ginseng (Panax ginseng C. A. Meyer) and Residue Analysis of Various Pesticides in Ginseng and Soil

토양 중 잔류된 Tolclofos-methyl의 인삼(Panax ginseng C. A. Meyer)에 대한 이행 및 잔류 특성

  • Kim, Ji Yoon (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University) ;
  • Kim, Hea Na (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University) ;
  • Saravanan, Manoharan (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University) ;
  • Heo, Seong Jin (Environment Friendly Agricultural Products Safety Center) ;
  • Jeong, Haet Nim (Gangwon-do Agricultural Research and Extension Services) ;
  • Kim, Jang Eok (Department of Applied Biosciences, College of Agriculture and Life Sciences Kyungpook National University) ;
  • Kim, Kwan Rae (Department of Agronomy and Medicinal Plant Resources, Gyeongnam National University of Science and Technology) ;
  • Hur, Jang Hyun (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University)
  • 김지윤 (강원대학교 농업생명과학대학 바이오자원환경학과) ;
  • 김해나 (강원대학교 농업생명과학대학 바이오자원환경학과) ;
  • ;
  • 허성진 (친환경농산물안전성센터) ;
  • 정햇님 (강원도 농업기술원) ;
  • 김장억 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 김권래 (경남과학기술대학교 농학한약자원학부) ;
  • 허장현 (강원대학교 농업생명과학대학 바이오자원환경학과)
  • Received : 2014.09.02
  • Accepted : 2014.09.24
  • Published : 2014.09.30

Abstract

Recently, some of the previous studies reported that tolclofos-methyl is still exist in ginseng cultivated soil, even though it is has been banned for ginseng. Therefore, the current study was aimed to examine the levels of absorption and translocation of tolclofos-methyl from ginseng cultivated soil to ginseng root and leaf stem for the period of 1 year. For this study, ginseng plants were transplanted in pots and treated with $5.0mg\;kg^{-1}$ of tolclofos-methyl (50% WP). At the end of each interval periods (every three months) the samples (soil, roots and leaf stems) were collected and analyzed the absorption and translocation levels of tolclofos-methyl using gas chromatography and mass spectrometry (GC-MS). The limit of quantitation of tolclofos-methyl was found to be $0.02mg\;kg^{-1}$ and 70.0~120.0% recovery was obtained with coefficient of variation of less than 10% regardless of sample types. In this study, a considerable amount of translocation of tolclofos-methyl residues were found in soil (4.28 to $0.06mg\;kg^{-1}$), root (7.09 to $1.54mg\;kg^{-1}$) and leaf stem (0.79 to $0.69mg\;kg^{-1}$). The results show that the tolclofos-methyl was absorbted and translocated from ginseng cultivated soil to ginseng root and ginseng leaf stem and found to be decreased time-coursely. Secondly, we were also analyzed soil, root and leaf stems samples from Hongcheon, Cheorwon, Punggi and Geumsan by GC-MS/MS (172 pesticides), LC-MS/MS (74 pesticides). In this study, 43 different pesticides were detected ($0.01{\sim}7.56mg\;kg^{-1}$) in soil, root and leaf stem. Further, tolclofos-methyl was detected 4 times separately in root sample alone which is less ($0.01{\sim}0.05mg\;kg^{-1}$) than their maximum residual limit (MRL) in ginseng. Consequently, the results from both studies indicate the residues of tolclofos-methyl found in ginseng cultivated soil and ginseng ensuring their safety level. Moreover, long-term evaluations are needed in order to protect the soil as well as ginseng free from tolclofos-methyl residues.

Acknowledgement

Supported by : 농촌진흥청

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