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Angular Leaf Spot of Strawberry Caused by Xanthomonas fragariae

Xanthomonas fragariae에 의한 딸기 세균성모무늬병

  • Kwon, Jin-Hyeuk (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Yoon, Hae-Suk (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Kim, Jeong-Soon (National Agrobiodiversity Center, National Academy of Agricultural Science, RDA) ;
  • Shim, Chang-Ki (National Agrobiodiversity Center, National Academy of Agricultural Science, RDA) ;
  • Nam, Myeong-Hyeon (Nonsan Strawberry Experiment Station, Chungcheongnam-do Agricultural Research and Extension Services)
  • Received : 2010.02.09
  • Published : 2010.04.01

Abstract

Angular leaf spot of strawberry caused by Xanthomonas fragariae occurred sporadically in the farmers open field at Sugok-myon, Jinju city, and greenhouse at Okjong-myon, Hadong-gun, Gyeongnam province, Korea. Typical symptoms of angular leaf spot initially appeared as a minute, water-soaked, rotted lesion on the lower leaf surface and the minute spots expanded to form angular leaf spots, usually delimited by small veins. The lesion was translucent under the transmitted light and dark green under reflected light. The slow growing pathogen was a gram-negative, motile bacterium with single polar flagellum, and producing yellowish orange pigment on YDC medium. It showed very strong pathogenicity on the leaves of strawberry. On the basis of biological characteristics and pathogenicity test on host plants, the bacteria was identified as a Xanthomonas fragariae. This is the first report on angular leaf spot of strawberry caused by X. fragariae in Korea.

2009년 진주시 수곡면 딸기 노지재배 육묘 포장과 하동군 옥종면 촉성재배 시설하우스 딸기포장에서 병이 발생하였다. 병징은 잎에 수침상의 작은 반점이 서서히 생기면서 엽맥의 주위에 다각형의 모무늬 병반이 나타나고 노란색의 달무리가 형성하는 것이 특징이다. 병든 잎은 서서히 시들고 암갈색으로 말라 죽는다. YDC 배지 상에서 병원균의 균총은 노란색을 띤 오랜지 색소를 분비하며 둥근 콜로니를 형성하고 단극모를 가지고 있다. 딸기에 접종한 결과 병원성이 잘 나타났다. 이상과 같이 딸기에 발생한 병정, 병원균의 특징 및 병원성을 검정한 결과 Xanthomonas fragariae에 의한 딸기 세균성모무늬병으로 동정하였다.

Keywords

References

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  3. Distribution of Bacterial Angular Leaf Spot of Strawberry and Characterization of Xanthomonas fragariae Strains from Korea vol.22, pp.1, 2016, https://doi.org/10.5423/RPD.2016.22.1.9
  4. Epidemiology and Control of Strawberry Bacterial Angular Leaf Spot Disease Caused by Xanthomonas fragariae vol.32, pp.4, 2016, https://doi.org/10.5423/PPJ.OA.01.2016.0007