Korean Journal Plant Pathology (한국식물병리학회지)

The Korean Society of Plant Pathology (한국식물병리학회)
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Ecological Studies on Rice Sheath Blight Caused by Rhizoctonia solani IV. Inoculation Time of Sclerotium and Disease Development

벼 잎집무늬마름병의 생태학적 연구 IV. 균핵의 접종시기와 발병

  • Kim Chang Kyu (Department of Plant Pathology, Institute of Agricultural Sciences, Rural Development Administration) ;
  • Ra Dong Soo (Department of Plant Pathology, Institute of Agricultural Sciences, Rural Development Administration) ;
  • Min Hong Sik (Department of Plant Pathology, Institute of Agricultural Sciences, Rural Development Administration) ;
  • Lee Young Hee (Department of Plant Pathology, Institute of Agricultural Sciences, Rural Development Administration) ;
  • Lee Eun Jong (Department of Plant Pathology, Institute of Agricultural Sciences, Rural Development Administration)
  • Published : 1985.09.01
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Abstract

Natural sclerotia of Rhizoctonia solani causing rice sheath blight were inoculated at 10 day intervals from June 15 to July 15 in paddy field, Icheon, Korea. Percentage of infected stems, top lesion height and percentage of. lesion height vs. plant height were higher in the early inoculated plots than in the late inoculated ones. However, rio significant differences among inoculation dates of sclerotia were found on the basis of degree of damage at maturing stage and rice yield. These results suggest that the time of initial symptom appearance under the same inoculum potential may not affect the damage of rice plants by the fungus.

Rhizoctomia solani 자연균핵을 6월 15일부터 7월 15일까지 10일 간격으로 이천소재 병리시험포장에서 접종하였다. 이병경율, 병반높이, 병반고율은 후기접종구보다 조기접종구에서 높았다. 그러나 성숙기의 피해도 및 수량에 있어서는 접종시기간에 유의적인 차이가 인정되지 않았다. 이러한 결과는 같은 양의 전염원이 존재할 때에는 잎집무늬마름병 초기병반의 출현시기의 조만이 성숙기의 피해도에는 큰 영향을 미치지 않고 있음을 시사하고 있다.

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