The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Effects of Butachlor on Growth of Four Freshwater Algae

Butachlor의 4종 담수조류(freshwater algae)에 대한 생장영향

  • Park, Yeon-Ki (Pesticide Safety Division, National Institute of Agricultural Science and Technology) ;
  • Bae, Chul-Han (Agricultural Research Center, Hankooksamgong Co., Ltd.) ;
  • Kim, Byung-Seok (Pesticide Safety Division, National Institute of Agricultural Science and Technology) ;
  • Park, Kyung-Hoon (Pesticide Safety Division, National Institute of Agricultural Science and Technology) ;
  • Lee, Jea-Bong (Pesticide Safety Division, National Institute of Agricultural Science and Technology) ;
  • Shin, Jin-Sup (Pesticide Safety Division, National Institute of Agricultural Science and Technology) ;
  • Hong, Soon-Sung (Pesticide Safety Division, National Institute of Agricultural Science and Technology) ;
  • Cho, Kyung-Won (Agricultural Research Center, Hankooksamgong Co., Ltd.) ;
  • Lee, Kyu-Seung (Chungnam National University) ;
  • Lee, Jung-Ho (Daegu University)
  • 박연기 (농업과학기술원 농산물안전성부) ;
  • 배철한 (한국삼공(주) 농업연구소) ;
  • 김병석 (농업과학기술원 농산물안전성부) ;
  • 박경훈 (농업과학기술원 농산물안전성부) ;
  • 이제봉 (농업과학기술원 농산물안전성부) ;
  • 신진섭 (농업과학기술원 농산물안전성부) ;
  • 홍순성 (농업과학기술원 농산물안전성부) ;
  • 조경원 (한국삼공(주) 농업연구소) ;
  • 이규승 (충남대학교 농업생명과학대학) ;
  • 이정호 (대구대학교 사범대학)
  • Published : 2008.03.31
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Abstract

Algae are vital in the primary production of the aquatic ecosystem, having been considered as good indicators of the bioactivity of pesticides. Algae have short life cycle, respond quickly to environmental change and their diversity and density can indicate the quality of their habitat. The purpose of the study was to determine the growth inhibition effects of butachlor (Tech. 93.4%) and $K_2Cr_2O_7$ (Tech. 99.5%) in Selenastrum capriconutum, Scenedesmus subspicatus, Chlorella vulgaris and Nitzschia palea during and exposure period of 72 hours. The toxicological responses of S. capriconutum, S. subspicatus, C. vulgaris and N. Palea to butachlor, expressed in individual $ErC_{50}$ values were 0.0022, 0.019, 8.67 and $4.94\;mg\;L^{-1}$, respectively. NOEC values were 0.0008, 0.0016, 5.34 and $2.92\;mg\;L^{-1}$, respectively. S. capriconutum was more sensitive than the other algae species. The toxicological responses of S. capriconutum, S. subspicatus, C. vulgaris and N. palea to $K_2Cr_2O_7$ expressed as $ErC_{50}$ values were 0.91, 0.78, 0.85 and $0.57\;mg\;L^{-1}$, respectively. NOEC values were 0.2, 0.2, 0.2 and $0.18\;mg\;L^{-1}$, respectively. Growth inhibition of S. capriconutum, S. subspicatus, C. vulgaris and N. palea from PEC of butachlor were 100, 75, 0 and 0%, respectively.

우리나라에서 사용되고 있는 벼재배용 제초제인 butachlor의 담수조류에 대한 생장영향을 알아보고자 녹조류 Selenastrum capriconutum, Scenedesmus subspicatus, Chlorella vulgaris 3종과 규조류 Nitzschia palea 1종에 대해 72시간 생장저해시험(growth inhibition test)을 수행하였다. 시험결과 butachlor에 대한 S. capricornutum, S. subspicatus, C. vulgaris, 그리고 N. palea의 생장율 기준 반수영향농도($EC_{50}$)는 각각 0.0022, 0.019, 8.67 그리고 $4.94\;mg\;L^{-1}$이었고, 무영향농도(NOEC)는 0.0008, 0.0016, 5.34 그리고 $2.92\;mg\;L^{-1}$로 나타나 S. capricornutum가 가장 높은 감수성을 보였다. 양성대조물질인 $K_2Cr_2O_7$에 대한 S. capricornutum, S. subspicatus, C. vulgaris 그리고 N. palea의 생장율 기준 $EC_{50}$은 각각 0.91 0.78, 0.85 그리고 0.57 mg $EC_{50}$이었고, NOEC는 각각 0.2, 0.2, 0.2 그리고 0.18 mg $EC_{50}$였다. butachlor를 논에 살포하였을 때 논물에 전량 용해된 후 배수로를 통해 농수로에 배출될 때를 가정한 환경추정농도(Predicted Environmental Concentration; PEC)에 따른 생장저해율을 계산한 결과, S. capricornutum와 S. subspicatus는 각각 100%와 75%의 생장율 저해를 보였으나 C. vulgaris와 N. palea는 영향이 없었다.

Keywords

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