Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Spread of Bacterial Canker of Kiwifruit by Secondary Infection of Pseudomonas syringae pv. actinidiae Biovar 3 in Gyeongnam in 2016

2016년 경남지역 Pseudomonas syringae pv. actinidiae Biovar 3의 2차감염에 의한 키위 궤양병의 확산

  • Published : 2016.12.31
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Abstract

Bacterial canker caused by Pseudomonas syringae pv. actinidiae (Psa) occurred at 202 kiwifruit orchards for the survey period of 2013-2016, of which Psa biovar 2 (Psa2) and Psa biovar 3 (Psa3) were detected at 73 and 129 kiwifruit orchards, respectively. The number of kiwifruit orchards infected by Psa3 in 2016 increased nearly two times compared to 2015. Psa3 was detected from all the kiwifruit cultivars except some kiwiberry cultivars growing in Korea. Yellow-fleshed cultivars Hort16A and Jecy-gold and red-fleshed cultivar Hongyang were highly susceptible to Psa3. Our epidemiological and random amplification of polymorphic DNA analyses indicated that the first Psa3 incidence on Hongyang orchard in Sacheon, Gyoungnam might result from an introduction of Psa3-contaminated pollens from China for artificial pollination in 2014 and recent outbreaks of Psa3 in Sacheon and Goseong, Gyoungnam in 2016 might be due to rapid spread of bacterial canker by secondary infection of Psa3 from Hongyang orchard to neighboring Jecy-gold and Hayward orchards.

2013년부터 2016년까지 P. syringae pv. actinidiae에 의한 궤양병에 감염된 것으로 확인된 과수원수는 202개였는데, Psa2가 73개 과수원에서 검출되었고 Psa3는 129개 과수원에서 검출되었다. 2015년에 비해 2016년 Psa2에 감염된 과수원은 거의 증가하지 않았지만 Psa3에 감염된 과수원은 두 배 가량 증가했다. 우리나라에서 재배하고 있는 키위 품종들 중에서 일부 토종다래를 제외한 모든 키위 품종들에서 Psa3가 검출되어 아직까지 Psa3에 저항성인 품종은 없다는 것이 확인되었다. 조사된 품종들 중에서 골드키위 품종인 Hort16A와 제시골드와 레드키위 품종인 홍양이 Psa3에 가장 감수성이었다. 경남지역에서 역학조사와 RAPD 분석 결과 2014년 홍양 과수원에서 최초 Psa3에 의한 궤양병은 중국에서 수입한 Psa3에 오염된 꽃가루에 의해 발생했고, 2016년 경남 사천과 고성 지역의 과수원들에서 궤양병의 대발생은 홍양 과수원으로부터 근처 제시골드와 헤이워드 과수원으로 2차감염에 의한 Psa3의 급속한 확산 때문으로 추정된다.

Keywords

References

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