Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Residue Levels of Chlorpyrifos and Chlorothalonil in Apples at Harvest

Chlorpyrifos 및 Chlorothalonil의 사과 생산단계별 잔류특성

  • Kim, Young-Sook (Department of Agricultural Chemistry, Kyungpook National University) ;
  • Park, Ju-Hwang (Department of Agricultural Chemistry, Kyungpook National University) ;
  • Park, Jong-Woo (Department of Agricultural Chemistry, Kyungpook National University) ;
  • Lee, Young-Deuk (Department of Agricultural Chemistry, Daegu University) ;
  • Lee, Kyu-Seung (Department of Agricultural Chemistry, Chungnam National University) ;
  • Kim, Jang-Eok (Department of Agricultural Chemistry, Kyungpook National University)
  • Published : 2003.06.30
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Abstract

An organophosphorus insecticide, chlorpyrifos and an arylnitrile fungicide, chlorothalonil commonly used far apple were subjected to a residual investigation under field conditions to ensure safety of terminal residues at harvest. After pesticides were applied at standard rate in apple tree fer 15 days for chlorpyrifos and 30 days far chlorothalonil, persistence of their residues in apple was investigated by several interval. At harvest, residual concentrations of chlorpyrifos and chlorothalonil in apple were 1.3 and 2.4mg/kg, respectively, and the residue levels were higher than MRL 1.0 mg/kg in Korea. As well fitted by the first-oder kinetics, biological half-lives of the pesticide residues in apple were 9.3 days for chlorpyrifos and 32.2 days for chlorothalonil. During the storage, half-lives of chlorpyrifos and chlorothalonil were 35.0 and 56.3days at room temperature, and 120.7 and 182.8 days at 412, respectively. Distribution of chlorpyrifos residue in flesh, fruit skin and stalk cavity of each apple corresponded to 0.1% 22.8% and 77.1%, respectively. In case of chlorothalonil, residue in flesh, fruit skin and stalk cavity was 4.4%, 10.4% and 85.2%, respectively.

사과의 생산단계에서의 잔류허용기준 설정과 최종 소비단계에서의 안전성 평가자료로 활용하기 위하여 사과에 많이 살포되는 살충제 chlorpyrifos 및 살균제 chlorothalonil의 사과 재배기간 중 생물학적 반감기, 보관방법에 따른 잔류량 변화 그리고 부리별 잔류량 분포를 조사하였다. 사과 재배단계에서의 생물학적반감기는 chlorpyrifos 살포 후 15일 chlorothalonil 살포 후 30일까지의 잔류량 변화를 조사한 결과 chlorpyrifos 9.3일, chlorothalonil 32.2일로 나타났다. 사과의 유통과정중에서 일어날 수 있는 두 약제의 잔류량 변화는 실온저장시 chlorpyrifos 35일, chlorothalonil 56.3일이었고, 냉장저장시에는 chlorpyrifos 120.7일, chlorothalonil 182.2일의 반감기를 나타내었다. 사과의 부의별 잔류량을 조사한 결과 chlorpyrifos의 경우 움푹 파인 부위의 과피 77.1%, 나머지 과피 22.8%, 과육 부리에서는 0.1%로 나타났고, chlorothalonil의 경우 움푹 파인 부위의 과피 85.2%, 나머지 과피 10.4%, 과육 부위에서 4.4%로 나타났다. 사과 중 두 약제의 잔류량은 대부분인 $95{\sim}99%$가 과피에 잔류하는 것으로 나타났다.

Keywords

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