Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Stability of Matrine and Oxymatrine from the Biopesticide from Sophora flavescens under Aquatic and Soil Environment

고삼 추출물을 주성분으로 하는 유기농자재의 alkaloid계 살충성분 2종의 토양 및 수계 노출 안정성

  • Kim, Jin Hyo (Chemical Safety Division, National Academy of Agricultural Science, Rural Development of Administration) ;
  • Choi, Geun-Hyoung (Chemical Safety Division, National Academy of Agricultural Science, Rural Development of Administration) ;
  • Lim, Sung-Jin (Chemical Safety Division, National Academy of Agricultural Science, Rural Development of Administration) ;
  • Park, Byung-Jun (Chemical Safety Division, National Academy of Agricultural Science, Rural Development of Administration)
  • 김진효 (농촌진흥청 국립농업과학원 화학물질안전과) ;
  • 최근형 (농촌진흥청 국립농업과학원 화학물질안전과) ;
  • 임성진 (농촌진흥청 국립농업과학원 화학물질안전과) ;
  • 박병준 (농촌진흥청 국립농업과학원 화학물질안전과)
  • Received : 2014.11.07
  • Accepted : 2015.01.06
  • Published : 2015.03.31
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Abstract

BACKGROUND: The stabilities of the two alkaloidal insecticides of S. flavescens including matrine and oxymatrine are important factor to establish expiry date and usage manual for crop protection. However, the environmental stability of the compounds had not been studied with the extract and its commercial biopesticide. METHODS AND RESULTS: The environmental stabilities of the two alkaloids were performed with extract of S. flavescens, and its two commercial biopesticides both in controlled aquatic and soil conditions. The half-lives of the total matrines for the extract and its two commercial biopesticides were estimated over 200 days both under aerobic and anaerobic water condition. Under dry soil condition, the initial decay rates of the matrines were calculated 0.0804-0.1275 ($t_{1/2}$ 5.4-8.6 days), and the half-lives under wet soil condition were calculated 33.0-231 days. Total soil bacteria on the wet soil ranged 6.0-8.0 log CFU/g-soil during the experiments period. CONCLUSION: The aquatic mixture of the extract showed excellent stability both with the extract and its biopesticides, however, the stability of soil mixture were shorter than the aquatic mixture, suggesting that soil metal consider as a catalyst for the degradation of the two alkaloids.

Keywords

References

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