Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Effects of Bacterial Leaf Blight Occurrence on Rice Yield and Grain Quality in Different Rice Growth Stage

벼 생육시기별 흰잎마름병 발병이 쌀 수량감소 및 미질에 미치는 영향

  • 노태환 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 이두구 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 박종철 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 심형권 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 최만영 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 강미형 (전북농업기술원 남원고냉지화훼시험장) ;
  • 김재덕 (농촌진흥청 작물과학원 호남농업연구소)
  • Published : 2007.04.01
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Abstract

We investigated the first symptom emerging date of rice bacterial leaf blight disease during four years from 2002 to 2005. The disease occurrence date was earlier 20$\sim$30 days in 2005 than that of 2002. The damage in different rice growth stage by the bacterial disease on rice yield and grain quality in southern part of Korea was examined. The disease decreased rice yield following by increased infection rates. Slight loss in rice yield and brown head rice rate were observed at below 10% level of infected leaf area, while over 25% infected leaf area caused the significant decrease in rice yield and brown head rice rate. More than 50% of the infected leaf area rate caused 29% yield reduction in case of infection at panicle formation stage and 18% of brown head rice rate. Cooked rice quality was also affected in the diseased rice by damage in palatability score and viscosity.

2002년부터 2005년까지 4년간 벼 흰잎마름병 초발병 조사결과 2002년보다 초발병일이 20$\sim$30일 이상 빨라지고 있음을 확인하였다. 벼 흰잎마름병 발병시기 및 병반면적율에 따라 수량이 감소하였는데 병반면적률이 10% 이하에서는 피해가 적었으나, 병반적율이 증가함에 따라서 수량감소가 점점 많아졌고, 25% 이상일 때부터 수량감소 및 현미천립중 등에서 현저히 낮아지고 병반면적율이 50% 이상이고 유수형성기 발병시 수량 29%, 현미천립중 2.3g, 현미완전립률 18%까지 감소되었다. 밥맛의 기준이 되는 식미치인 점도에서도 병반면적율이 증가함에 따라 낮은 식미치를 보였다.

Keywords

References

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