Establishment of Economic Threshold Caused by Rice Sheath Blight Disease severity

벼 잎집무늬마름병의 발생정도에 따른 경제적 방제수준 설정

  • Received : 2015.08.31
  • Accepted : 2015.11.09
  • Published : 2015.12.31


This research was performed to establish economic threshold (ET) for rice sheath blight disease with the cultivar Odeabyeo. Total yield and yield components, such as the panicle number per hill, the spikelet per panicle, the percent ripened grain and the thousand grain weight were evaluated depending on the disease severity of sheath blight on rice, respectively. Significant negative correlation between the percent of diseased hill (PDH) and total yield was observed (r = -0.93). Moreover, negative correlation coefficients were found between PDH and spikelet per panicle, and percent ripened grain (r = -0.66 and -0.77, respectively). There were no correlations between PDH and the panical number per hill, and a thousand grain weight, respectively. In this study, economic threshold level on sheath blight disease on rice was established on 7.8% of PDH.


rice;sheath blight;economic threshold level


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