Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Aerial Distribution of Bacterial Groups of Xanthomonas oryzae (Uyeda et Ishiyama) Dowson in Korea

벼 흰빛잎마름병균의 균군의 분포에 관한 연구

  • Choi Yong Chull (Institute of Agricultural Sciences, Office of Rural Development) ;
  • Lee Soon Gu (College of Agricultural, Seoul National University) ;
  • Chung Bong Jo (Institute of Agricultural Sciences, Office of Rural Development) ;
  • Cho Yong Sup (College of Agricultural, Seoul National University)
  • 최용철 (농촌진흥청 농업기술연구소) ;
  • 이순구 (서울대학교 농과대학) ;
  • 정봉조 (농촌진흥청 농업기술연구소) ;
  • 조용섭 (서울대학교 농과대학)
  • Published : 1979.03.01
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Abstract

Studies on bacterial groups of X. oryzae in Korea has been continued annually since 1975. The present report maintained the result of recent Studies covering on 224 isolates collected front 191 portions of all over the country during the period from 1977 to 1978. The four bacterial groups, I, II, III and V, were found with the ratio of 79, 16, 3 and 3 per-cent, respectively. Variable bacterial groups were found in Chung- nam province while in Jeon- nam province the group II was more pre4valent than group I. Variety-group 'Kimmaze' maintained much more of heterogeneous bacterial groups, and it was significant, especially, on cultivar Milyang $\#23$. Variety-group 'Kogyoku' maintained group II, only while it was possible to isolate group I, II, and III from variety group 'Rantai-emas.' Isolates from Kresek symptom, mostly on Milyang $\#23$, belonged to group I and group II, and their occurring incidence were 20 and 8 out of 28 isolates, respectively. Variability of bacterial group was differed with the location of fields. There were homogeneous and heterogeneous groups, respectively, regardless of host varieties in a given locations.

1977년 및 1978년에 걸쳐 전국 191개 지역에서 채집분리한 병원균의 균군에 대한 결과는 다음과 같았다. 1. 224균주의 병원성검정은 I균군 $176(79\%)$, II균군 $35(16\%)$, III균군 $7(3\%)$, V균군 $6(3\%)$균주로서 I균군의 분포가 제일 많았다. 2. 채집된 도별 균군분포는 충남이 가장 다양하였으며, 전남에서는 I균군의 분포보다 I균군이 많은 경향을 보이고 있었다. 3. 균군과 품종군간에는 전남풍군의 품종에 균군이 다양하게 검정되었고, 이중 밀양23호에서 많은 균주가 채집분리되었으며, 황옥군에서는 II균상의 침해만 받았으나, Rantai emas품종군에서는 I, II균군도 볼수있었다. 4. 급성형(Kresek)발병주에서 분리된 28균주의 균군은 I군 20균주, II군 8균주였고, 이병된 품종으로는 밀양23호가 많은 발병을 나타내었다. 5. 병원균 균군의 동일지역에서의 분포는 조사장소에 따라 수개품종이 단일균군에 감염된 곳이 있는가 하면 혼합균군에 의해 감염된 곳도 있었다.

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