Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Evaluation of Insecticidal Activity of Plant Extracts against the Diamondback Moth, Plutella xylostella (Lepidoptera: Plutellidae) on Vegetable Plant

배추좀나방(Plutella xylostella)에 대한 식물추출물의 살충력 평가

  • Choi, I-Jin (Team of City Farm, Seoul Agricultural Technology Center) ;
  • Kwon, Hyuk-Hyun (Team of City Farm, Seoul Agricultural Technology Center) ;
  • Lee, Han-Ho (Team of City Farm, Seoul Agricultural Technology Center) ;
  • Son, Hyoung-Gi (Team of City Farm, Seoul Agricultural Technology Center) ;
  • Hong, Sang-Kil (Team of City Farm, Seoul Agricultural Technology Center) ;
  • Kang, Jong-Woon (Team of City Farm, Seoul Agricultural Technology Center) ;
  • Park, Yu-Soon (Team of City Farm, Seoul Agricultural Technology Center)
  • 최이진 (서울시 농업기술센터 도시농업팀) ;
  • 권혁현 (서울시 농업기술센터 도시농업팀) ;
  • 이한호 (서울시 농업기술센터 도시농업팀) ;
  • 손형기 (서울시 농업기술센터 도시농업팀) ;
  • 홍상길 (서울시 농업기술센터 도시농업팀) ;
  • 강종운 (서울시 농업기술센터 도시농업팀) ;
  • 박유순 (서울시 농업기술센터 도시농업팀)
  • Received : 2012.11.09
  • Accepted : 2013.02.14
  • Published : 2013.02.28
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Abstract

This study focused on the usefulness of plant extracts for a city organic farm. Insecticidal activity of 8 plant species, plants crude extracts by ethanol and water, against third instar larvae (susceptible strain) of Plutella xylostella was evaluated in this study. Ethanol(25%) extracts of plant materials had better insecticidal activity than water extracts at the room temperature. Insecticidal activity were investigated by leaf disc spray method. Five plant extracts (Capsicum annuum, Chelidoniun majus, Leonurus sibiricus, Coptis japonica, Mentha piperascens) showed over 50% insecticidal activity to P. xylostella at the concentration of $1500mg{\cdot}L^{-1}$. Extract of C. annuum showed the highest insecticidal activity (83.3%) against P. xylostella. Phytotoxicity was not observed on Raphanus sativus and Brassica campestris with spray application. Seed germination and growth of two plants were not affected. Extract of C. japonica revealed 73.3% control efficacy against P. xylostella of R. sativus and showed 70% control efficacy against those of B. campestris, respectively, in plastic house. Insecticidal activity against various insects was observed in C. japonica extract as 87.4% for R. sativus and 74.3% for B. campestris in the field. These results suggested that extracts of C. annuum, C. japonica showed the highest insecticidal activity, and could be used as city farm insecticides for organic farming.

본 연구는 살충효과가 알려진 식물체들 중 8종을 공시하여 배추좀나방에 대하여 살충효과의 여부를 검정하고 친환경 유기농산물 재배에 활용할 수 있는지 검토하였다. 식물 추출물 $1500mg{\cdot}L^{-1}$에서 48시간 후의 배추좀나방 살충율은 고추씨 추출물이 83.3%로 가장 높았다. 생물검정을 해서 배추좀나방 방제효과가 있는 고추씨, 애기똥풀, 익모초, 박하, 황련 식물추출물 5종을 선발하였다. 선발한 식물체 5종의 약해 검정 결과 열무와 엇갈이배추의 발아, 유아, 유엽의 생장에 해로운 영향을 미치지 않았다. 온실 안에서 pot에 식물추출물을 처리하여 조사하였는데 열무는 황련추출물을 처리할 때 73.3%의 방제가를 보였고, 고추씨 추출물도 70%의 방제가를 나타냈다. 엇갈이배추는 황련추출물을 처리할 때 70%, 고추씨 추출물을 처리할 때 방제가가 66.7%이었다. 포장에서 선발한 식물추출물의 효과를 피해 엽률로 조사한 결과, 열무는 고추씨 추출물을 처리했을 때 방제가가 62.4%로 나타났다. 엇갈이배추는 황련추출물을 처리할 때 64.6% 방제가를 보였다. 식물추출물을 12회를 처리 한 후 수확 전에 조사한 결과 열무는 황련추출물 및 고추씨추출물은 방제가가 87.4%, 83.7%였고, 엇갈이배추는 방제가가 황련추출물이 74.3%, 애기똥풀 추출물이 69.3%를 나타냈다.

Keywords

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