Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Effects of Sawdust and Urea Application on Disease Severity and Streptomyces scabiei Pathogen Dynamics

톱밥 및 요소의 투입이 감자 더뎅이병 병원균(Streptomyces scabiei) 및 감자 더뎅이병 이병도 지수에 미치는 영향

  • Bak Gyeryeong (Highland Agriculture Research Institute, National Institute of Crop Science) ;
  • Lee Jeong-Tae (Highland Agriculture Research Institute, National Institute of Crop Science) ;
  • Jee Sam-nyu (Highland Agriculture Research Institute, National Institute of Crop Science)
  • 백계령 (국립식량과학원 고령지농업연구소) ;
  • 이정태 (국립식량과학원 고령지농업연구소) ;
  • 지삼녀 (국립식량과학원 고령지농업연구소)
  • Received : 2023.09.11
  • Accepted : 2023.11.11
  • Published : 2023.11.30
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Abstract

Potato common scab disease is caused by pathogens belonging to Streptomyces spp. and results in a serious yield loss worldwide. Despite decades of research aimed at disease management, a definitive control method remains undiscovered. This study aims to explore the correlation between the C/N ratio and urea application with potato common scab pathogen dynamics and disease severity. We applied sawdust with a high C/N ratio and urea into the soil prior to potato cropping, both in pot and field experiments. Disease severity assessments and quantification of the TxtB gene were conducted at the harvest stage. Furthermore, culture experiments were performed to assess the direct impact of urea on the pathogen. Our findings revealed that higher disease severity was correlated with a high C/N ratio application and pathogenic gene quantity. Urea exhibited a direct influence on S. scabiei activity, reducing the disease severity in pot experiments. However, the effects of urea application on disease suppression in the conductive field were inconclusive. Although the results of urea application experiments displayed inconsistencies between pot and field trials, urea worked as the control to suppress S. scabiei activity. Further investigations are needed under various field conditions to confirm these findings.

Keywords

Acknowledgement

이 논문은 농촌진흥청 연구사업 "감자 난방제 병해에 대한 미생물 활용 방제연구" (과제번호: PJ014866032021)에 의해 지원되었음.

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