Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Response to Fungicides of Colletotrichum spp. Isolated from Red Peppers in Sunchang, Korea

순창군 지역의 고추로부터 분리한 탄저병균의 살균제에 대한 반응

  • Ju, Hyeon-Yeong (Department of Environmental Horticulture, University of Seoul) ;
  • Son, Mi-Ra (Department of Environmental Horticulture, University of Seoul) ;
  • Kim, Jin-Won (Department of Environmental Horticulture, University of Seoul)
  • 주현영 (서울시립대학교 환경원예학과) ;
  • 손미라 (서울시립대학교 환경원예학과) ;
  • 김진원 (서울시립대학교 환경원예학과)
  • Received : 2021.08.31
  • Accepted : 2021.11.10
  • Published : 2021.12.31
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Abstract

In August 2020, 377 anthracnose strains were isolated from anthracnose-infected peppers collected from 25 farms in Sunchang-gun, Jeollabuk-do. Inhibition rate of mycelial growth of 11 pepper anthracnose fungicides registered in Korea was investigated for 62 strains selected by region and the degree of susceptibility to each fungicide was investigated. As a result of the fungicide susceptibility test of anthracnose to the fungicide, no resistant strains were observed in fluazinam, prochloraz manganese, and benomyl, but resistant strains appeared in at least three areas for other fungicides, and all strains in all regions were resistant to dithianon. Through this, it was confirmed that the fungicide resistance was expressed in the strain group due to the continuous treatment of the fungicide in some areas. By region, resistant strains to seven pesticides appeared in Sunchang-eup and Paldeok-myeon, and resistant strains to six pesticides appeared in Geumgwa-myeon, Bokheung-myeon, Ssangchi-myeon, Yudeung-myeon, and Pungsan-myeon. There was no significant correlation between fungicide registration time and emergence of resistant strains.

2020년 8월에 전라북도 순창군 소재 25개 고추 재배지에서 채집한 탄저병 감염 과실로부터 377개 탄저병균주를 분리한 후 지역별로 선발된 62개 균주를 대상으로 국내에 등록된 11개의 고추 탄저병 살균제에 대한 균사생장억제율을 조사하여 각각의 살균제에 대한 감수성 정도를 조사하였다. 살균제에 대한 탄저병균의 살균제 감수성 실험 결과 fluazinam, prochloraz manganese, benomyl에서는 저항성 균주가 관찰되지 않았으나 이외의 약제에서는 최소 3개의 지역에서 저항성 균주가 출현하였으며, dithianon은 모든 지역의 모든 균주가 저항성이었다. 이를 통해 일부 지역에서 살균제의 지속적인 처리로 인하여 균주집단 내 살균제 내성이 발현되었음을 확인할 수 있었다. 지역별로는 순창읍과 팔덕면에서 7개 농약에 대한 저항성 균주가 출현하였고, 금과면, 복흥면, 쌍치면, 유등면, 풍산면에서 6개 농약에 대한 저항성 균주가 출현하였음을 확인하였다. 약제 등록시기와 저항성 균주의 출현에는 유의미한 상관관계가 없었다.

Keywords

Acknowledgement

This work was supported by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry (IPET) through Agro and Livestock Products Safety·Flow Management Technology Development Project funded by NH Nonghyup and Ministry of Agriculture, Food and Rural Affairs and the Ministry of Agriculture (MAFRA) (319111-02).

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