한국유기농업학회지 (Korean Journal of Organic Agriculture)

  • 제25권3호
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  • Pages.631-642
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  • 2017
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  • 1229-3571(pISSN)
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  • 2287-819X(eISSN)
한국유기농업학회 (Korean Association of Organic Agriculture)
권호 표지
DOI QR코드

DOI QR Code

친환경 농자재와 곤충병원성 곰팡이 Isaria javanica의 처리 간격이 담배가루이(Bemisia tabaci) 방제에 미치는 영향

Influence of Pre-treated Eco-friendly Agricultural Materials on Control Efficacy of Isaria javanica Isolate against Sweet Potato Whitefly (Bemisia tabaci)

  • 이병주 (농촌진흥청 국립농업과학원) ;
  • 한지희 (농촌진흥청 국립농업과학원) ;
  • 황정화 (농촌진흥청 국립농업과학원) ;
  • 김정준 (농촌진흥청 국립농업과학원) ;
  • 이상엽 (농촌진흥청 국립농업과학원)
  • 투고 : 2017.07.11
  • 심사 : 2017.08.09
  • 발행 : 2017.08.31
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초록

작물의 재배 과정 중에 발생하는 해충을 효과적으로 방제하기 위하여 친환경 유기농자재, 미생물 살충제, 화학 살충제와 같은 다양한 방제제가 사용되고 있다. 이들은 다양한 해충과 병을 방제하기 위해 동일한 포장에서 동시에 또는 순차적으로 이용된다. 이 방제제들은 서로 영향을 미쳐 방제 효과도 달라질 수 있다. 따라서 미생물 살충제와 동시에 또는 동일 포장에 처리될 수 있는 다른 농자재의 혼용가능 여부를 조사할 필요가 있다. 따라서 본 연구에서는 시설하우스에서 가루이류 방제를 위해 등록된 친환경 유기농자재의 전처리가 담배가루이 방제를 위해 개발된 Isaria javanica 균주의 포자 발아, 균사 성장 그리고 방제효율에 미치는 영향을 조사하였다. 그 결과, 담배가루이 방제용으로 국내에서 개발된 I. javanica 균주는 4종(A, 파라핀오일+계피오일; B, 대두유; C, 님추출물+참깨오일; D, 채종유)의 가루이류 방제용 친환경 살충제 중 A 살충제에 의해 포자 발아($8.9{\pm}1.3%{\sim}24.5{\pm}0.9%$) 및 균사 성장($0.81{\pm}0.01cm{\sim}0cm$)이 감소되었다. 담배가루이 방제에서 친환경 유기농자재와 I. javanica 사이의 처리 간격이 미치는 효과 조사를 위해, 친환경 유기농자재 4종을 I. javanica 균주 처리 0, 1, 4, 7일 전 처리하고 방제 효과를 조사하였다. 친환경 유기농자재 전처리는 4종 모두 I. javanica의 담배가루이 방제효과를 감소시켰다. 따라서 국내에 등록된 가루이류 방제용 친환경 유기농자재 4종과 개발된 곰팡이 살충제 I. javanica를 동시에 또는 순차적으로 이용할 경우, 상호영향을 고려하여 7일 이상의 간격을 두고 살포하는 것이 효과적으로 담배가루이를 방제 할 수 있을 것으로 사료된다.

For effective control of insect pest which can outbreak in a field during crop cultivation, various control agents such as eco-friendly agricultural materials (EFAM) including microbial control agents and chemical pesticides have been applied at fields and these control agents may be treated simultaneous or sequential in the same field to suppress diverse pests and diseases. The agents may influence each other and control efficacy may also differ from interactions. Therefore we need to test compatibility of microbial control agents with other agricultural agents. In this study, we investigated influence of pre-treated EFAMs, which are registered for whitefly control in greenhouse, on germination, mycelial growth and control efficacy of Isaria javanica isolate against sweet potato whitefly. The results showed that a mixture of paraffin oil+cinnamon oil among 4 EFAMs highly reduced germination ($8.9{\pm}1.3%{\sim}24.5{\pm}0.9%$) and mycelial growth ($0.81{\pm}0.01cm{\sim}0cm$) of I. javanica. To investigate the effects of the treatment interval between EFAMs and I. javanica on sweet potato whitefly control, four different EFAMs were pre-treated 0, 1, 4, and 7 days before applying I. javanica. Pre-treatment of four EFAMs inhibited insecticidal activity of I. javanica against sweet potato whitefly. Therefore when EFAMs and a mycopesticide using I. javanica spray simultaneous or sequential, application of EFAMs need more than 7 days interval after treatment of mycopesticide at field.

키워드

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