Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Combined Application of Bacillus sp. JJ2-01 and Garlic Oil for Controlling Sclerotium rolfsii in Pepper Plants

Bacillus sp. JJ2-01과 마늘 오일 혼합처리에 의한 고추 흰비단병 억제 효과

  • 문혜정 (국립농업과학원 농업미생물과, 전북대학교 농생물학과) ;
  • 주호종 (전북대학교 농생물학과) ;
  • 안성호 (국립농업과학원 농업미생물과) ;
  • 송재경 (국립농업과학원 농업미생물과) ;
  • 상미경 (국립농업과학원 농업미생물과)
  • Received : 2022.05.25
  • Accepted : 2022.07.11
  • Published : 2022.08.31
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Abstract

Southern blight caused by Sclerotium rolfsii is a serious soilborne disease in economically important crops including pepper. In this study, we conducted a selection of antagonistic bacterial strains and organic materials to biologically control the disease. Out of 39 strains isolated from soils at Jinju in Korea, strain JJ2-01 showed the highest mycelial growth inhibition; garlic oil among various organic materials significantly reduced disease incidence and severity. When a combination of strain JJ2-01 and garlic oil, or each was drenched into the pepper plants, combined treatment and garlic oil significantly suppressed the disease development, however, acid phosphatase activity in garlic oil-treated plants decreased. In the case of combined treatment, the soil activities did not affect by treatment, while soil urease activity was significantly increased by the combined treatment. Therefore, given soil quality and health for sustainable agriculture, the combination of strain JJ2-01 and garlic acid was an effective application for environmental-friendly control of Southern blight in pepper plants.

본 연구에서는 흰비단병에 대한 길항 미생물과 유기농업자재를 선발하여 혼합 처리 시 방제 효과를 확인하고자 하였다. 토양에서 분리한 39균주 중 균사 생장 억제력이 가장 높은 JJ2-01 균주를 길항 미생물로 선발하였다. 또한, 유기농업자재의 흰비단병 발병도를 확인하여 병 억제 효과가 있는 유기농업자재로 마늘 오일을 선발하였다. 선발 미생물과 마늘 오일을 혼합하거나 마늘 오일을 단독으로 사용할 경우 병 억제 효과는 유사하게 나타났지만, 마늘 오일을 단독으로 사용할 경우 토양의 acid phosphatase의 활성이 감소하였다. 반면, 마늘 오일과 선발 미생물 JJ2-01 균주를 혼합 처리하였을 때 urease 활성이 증가하였다. 본 실험의 결과를 종합하면, 선발 미생물 JJ2-01 균주와 마늘 오일을 혼합하여 사용하면 고추 흰비단병을 효과적으로 억제하고 토양의 질과 건전성을 유지 또는 향상하는데 도움이 될 수 있을 것이라 판단된다.

Keywords

Acknowledgement

본 연구는 국립농업과학원 연구개발사업(PJ01505102)에 의하여 이루어진 것임.

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