Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Residual Patterns of Strobilurin Fungicides in Korean Melon under Plastic Film House Condition

Strobilurin계 살균제의 시설재배 참외 중 잔류 양상

  • Park, Eun-Jeong (School of Applied Biosciences, College of Agricultural Life Science, Kyungpook National University) ;
  • Lee, Ju-Hee (School of Applied Biosciences, College of Agricultural Life Science, Kyungpook National University) ;
  • Kim, Tae-Hwa (School of Applied Biosciences, College of Agricultural Life Science, Kyungpook National University) ;
  • Kim, Jang-Eok (School of Applied Biosciences, College of Agricultural Life Science, Kyungpook National University)
  • 박은정 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 이주희 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 김태화 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 김장억 (경북대학교 농업생명과학대학 응용생명과학부)
  • Published : 2009.09.30
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Abstract

The strobilurin fungicides, azoxystrobin and kresoxim-methyl, were investigated to know the biological half-lives and dissipation patterns in Korean melon under plastic film house condition. Used pesticides for field application were 20% azoxystrobin of suspension concentrate and 47% kresoxim-methyl of water dispersible granule. Two pesticides were sprayed at recommended and double dose rate. Pesticide residues in Korean melon were analyzed until 14 days after application. The azoxystrobin was analyzed by HPLC equipped with UV detector after cleanup with florisil glass column. Initial residue concentrations of azoxystrobin in Korean melon at recommended and double dose rate were 0.09 mg/kg and 0.14 mg/kg, respectively. Those were less than 0.2 mg/kg maximum residue limit of Korean melon established by KFDA. The biological half-lives of azoxystrobin in Korean melon were 4.7 days at recommended dose rate and 7.8 days at double dose rate. Initial concentrations of kresoxim-methyl which was analyzed by GLC-ECD in Korean melon at recommended and double dose rate were 0.10 mg/kg and 0.23 mg/kg, respectively. Those were less than 1.0 mg/kg, MRL. The biological half-lives of kresoxim-methyl in Korean melon were 4.1 days at recommended dose rate and 4.8 days at double dose rate. The residue amounts of both pesticide was lower than MRL and biological half-lives were not so long. Because the weight of Korean melon under plastic film house condition was fast increased during cultivation.

Azoxystrobin과 kresoxim-methyl의 참외 중 반감기와 잔류양상을 조사하였다. Azoxystrobin의 참외 중 0일차 잔류량은 기준량 및 배량 처리구에서 각각 0.09 및 0.14 mg/kg으로 나타났으며 농약의 반감기 소실곡선식은 y=0.0766e$^{-0.138x}$ ($r^2$=0.9424) 및 y=0.1143e$^{-0.0890x}$ ($r^2$=0.9310) 이었으며 생물학적 반감기는 각각 5.0일 및 7.8일 이었다. Kresoxim-methyl의 참외 중 0일차 잔류량은 기준량 및 배량 처리구에서 각각 0.10 및 0.23 mg/kg으로 나타났으며 농약의 소실곡선식은 y=0.0896e$^{-0.1672x}$ ($r^2$=0.9428) 및 y=0.1504e$^{-0.1446x}$ ($r^2$=0.9040) 이었고 생물학적인 반감기는 각각 4.1일 및 4.8일 이었다. 재배기간 중 참외의 무게증가에 농약희석효과를 배제한 절대잔류농도는 약제 살포 후 14일 경과시 azoxystrobin은 기준량 및 배량에서 0.01 및 0.05 mg/kg으로서 각각 83.6 및 67%의 농약이 분해되었다. Kresoxim-methyl은 각각 0.01 및 0.03 mg/kg 으로서 86.2 및 87.8% 정도의 농약 분해율을 보였다.

Keywords

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