제주지역 감자더뎅이병 발생 특성

다국어 초록 (Multilingual 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 28~30oC, and the optimum pH for that 6~7.