Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Effect of Rainfall During the Blossom Infection Risk Period on the Outbreak of Fire Blight Disease in Chungnam province

꽃감염 위험기간 중의 강우가 충남지역 과수 화상병 발병에 미치는 영향

  • Byungryun Kim (Environmentally-Friendly Agriculture Division, Chungnam Agricultural Research and Extension Services) ;
  • Yun-Jeong Kim (Environmentally-Friendly Agriculture Division, Chungnam Agricultural Research and Extension Services) ;
  • Mi-Kyung Won (Environmentally-Friendly Agriculture Division, Chungnam Agricultural Research and Extension Services) ;
  • Jung-Il Ju (Environmentally-Friendly Agriculture Division, Chungnam Agricultural Research and Extension Services) ;
  • Jun Myoung Yu (Department of Applied Biology, Chungnam National University) ;
  • Yong-Hwan Lee (Crop Protection Division, National Academy of Agricultural Science)
  • 김병련 (충청남도농업기술원 친환경농업과) ;
  • 김윤정 (충청남도농업기술원 친환경농업과) ;
  • 원미경 (충청남도농업기술원 친환경농업과) ;
  • 주정일 (충청남도농업기술원 친환경농업과) ;
  • 유준명 (충남대학교 응용생물학과) ;
  • 이용환 (국립농업과학원 작물보호과)
  • Received : 2023.11.12
  • Accepted : 2023.12.04
  • Published : 2023.12.30
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Abstract

In this study, the extent of the impact of rainfall on the outbreak of fire blight during the blossom infection risk period was explored. In the Chungnam province, the outbreak of fire blight disease began in 2015, and changes in the outbreak's scale were most pronounced between 2020 and 2022, significantly escalating from 63 orchards in 2020 to 170 orchards in 2021, before decreasing to 46 orchards in 2022. In 2022, the number of incidence has decreased and the number of canker symptom in branches has also decreased. It was evaluated that the significant decrease of fire blight disease in 2022 was due to the dry weather during the flowering season. In other words, this yearly fluctuation in fire blight outbreaks was correlated with the presence or absence of rainfall and accumulated precipitation during the blossom infection risk period. This trend was observed across all surveyed regions where apples and pears were cultivated. Among the weather conditions influencing the blossom infection risk period, rainfall notably affected the activation of pathogens from over-wintering cankers and flower infections. In particular, precipitation during the initial 3 days of the blossom infection risk warning was confirmed as a decisive factor in determining the outbreak's scale.

과수의 개화기 꽃감염 위험기간 중의 강우가 화상병의 발병에 어느 정도 영향을 주었는지 조사하였다. 2015년부터 시작된 충남지역의 과수 화상병 발병 기간 중에서 2020년부터 2022년의 발병 규모가 가장 크게 변화하였는데, 2020년에는 63개 과원에서 발병하였고, 2021년에는 170 과원으로 크게 증가하였으나, 2022년에 46개 과원으로 감소하였다. 2022년에는 발병과원의 발병 나무 가지에 형성된 궤양증상이 감소하였고, 이것은 개화기 건조한 날씨에 의한 것으로 평가 되었다. 즉, 꽃감염 위험기간 중의 강우 여부 및 누적 강수량에 따라 그 해의 화상병 발병은 증가하거나 감소하였다. 이러한 경향은 사과와 배가 재배되는 조사지역 모두에서 유사한 경향이었고, 꽃감염 위험시기의 기상환경 중 강우는 월동 궤양으로부터 활성화된 병원균의 전반과 꽃 감염에 큰 영향을 주었으며, 특히 꽃감염 위험경보가 시작되는 초기 3일간의 강수량은 발병 규모를 결정하는 요인으로 확인되었다.

Keywords

Acknowledgement

이 논문은 2020~2024년도 농촌진흥청 공동연구과제 '충남지역 과수 화상병 발생 특성 조사(과제번호 RS-2020-RD009337)' 연구의 지원에 의해 수행되었습니다.

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