Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Comparison of Residue Patterns for Systemic and Non-systemic Pesticides in Strawberry

딸기 중 침투성 및 비침투성 농약에 따른 잔류특성 연구

  • You, Jung-Sun (Department of Food & Pharmaceutical Engineering, College of Life & Health Sciences, Graduate School of Hoseo University) ;
  • Gwak, Hye-Min (Department of Food & Pharmaceutical Engineering, College of Life & Health Sciences, Graduate School of Hoseo University) ;
  • Chang, Hee-Ra (Department of Food & Pharmaceutical Engineering, College of Life & Health Sciences, Graduate School of Hoseo University)
  • 유정선 (호서대학교 생명보건대학 식품제약공학부) ;
  • 곽혜민 (호서대학교 생명보건대학 식품제약공학부) ;
  • 장희라 (호서대학교 생명보건대학 식품제약공학부)
  • Received : 2020.10.05
  • Accepted : 2020.10.30
  • Published : 2020.12.31
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Abstract

BACKGROUND: The healthy food trend has encouraged the consumption of natural products, including berries. This trend is expected to increase the strawberry consumption. There has been a concern about the exposure of pesticides approved for use on strawberry. In this study, the dissipation patterns of systemic and non-systemic pesticides were evaluated in strawberry under plastic-covered greenhouse conditions. METHODS AND RESULTS: Cyflumetofen and dimethomorph were applied on strawberry in the critical GAP (Good Agricultural Practices). Strawberries were harvested at 0, 1, 2, 3, 5, 7 and 10 days after final application of the pesticides. The analyses of the residual pesticides were performed by HPLC-DAD with C18 column. The limits of quantitation (LOQ) of cyflumetofen and dimethomorph were 0.04 and 0.02 mg/kg, respectively. The recovery of cyflumetofen and dimethomorph were 88.1 ~ 103.3% and 79.0 ~ 110.2% for the spiked two levels (LOQ and 10LOQ), respectively. The biological half-lives of cyflumetofen and dimethomorph werer 7.5 and 8.9 days, respectively. The dissipation rates in strawberry were calculated by the statistics method at a 95% confidence level. The distribution showed that pesticides with low log Pow were indicated by the decreased dissipation rate and pesticides with similar log Pow and low solubility also showed the decreased dissipation rate. CONCLUSION: The residues of cyflumetofen and dimethomorph in strawberry at time 0 after the final application were below the established MRL in Korea. The dissipation behavior of systemic and non-systemic pesticides in strawberry is affected by their log Pow and water solubility values.

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References

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