Research in Plant Disease 2003;9(3):137-144.
Published online September 30, 2003.
제주지역 감자더뎅이병 발생 특성
홍순영, 강영길, 함영일
 
Developmental Characteristics of Potato Common Scab in Jeju Island
Soon Yeong Hong, Yong Kil Kang, Young Il Hahm
Abstract
This study was conducted to clarify developmental characteristics of scab in potato fields in Jeju island, Korea from 1995 to 1999. Occurrence of potato scab increased with repeated cultivation of potato and high soil pH in the fields. Incidence of the disease was as high as 54.8% in the repeatedly cultivated potato fields but relatively low as 20.8~26.3% in the non-cultivated fields and in the fields where barley and Chinese cabbage were formerly cultivated. A total of 66 isolates were obtained from the diseased potato tubers and identified as Streptomyces scabies, S. turgidiscabies and S. acidiscabies. The isolation frequency of each Streptomyces species was 37.7%, 14.8% and 18.0%, respectively. The optimum temperature for mycelial growth of the Streptomyces spp. was 28~30℃, and the optimum pH for that 6~7.
Key Words: potato scab, Streptomyces acidiscabies, S. scabies, S. turgidiscabies


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