국내 감자 연작 재배지에서 수집하여 분리동정한 더뎅이병원균인 Streptomyces scabies의 배양적, 형태적, 생리적 특성을 조사한 결과는 다음과 같다. 이병감자에서 분리된 균들은 병원성 균주와 비병원성 균주들로 구분되었고, 이들 간에는 뚜렷한 차이를 보였는데, 전형적인 병징을 나타내는 병원성균주는 비병원성균주와는 달리, 나선형의 포자사슬, 회색 포자, 멜라닌 색소를 생성하고 D-glucose, L-arabinose, D-fructose, D-mannitol, raffinose, rhamnose, sucrose, i-ino-sitol, D-xylose 등의 탄소원을 이용하였으며, 또한 7% NaC1 및 streptomycin sulfate, crystal violet, oleandomycin(100 ㎍/㎖), thallium acetate(10 ㎍/㎖, 100 ㎍/㎖)등의 항생물질에 감수성을 나타내었다.
Isolates of Streptomyces species isolated from continuous cropping potato fields with the occurrence of common scab of potato (Solanum tuberosum L.) were examined for cultural, morphological and physiological characteristics, and tested for pathogenicity on potato tubers. Both pathogenic and nonpathogenic isolates were isolated from infected potatoes. Most pathogenic isolates showed typical characteristics of S. scabies, showing spiral spore chains, gray spore colors, and also the ability of producing melanoid pigments, which were identified as S. scabies and determined to be the causal organism of the disease. D-glucose, L-arabinose, D-fructose, D-mannitol, raffinose, rhamnose, sucrose, i-inositol, and D-xylose amended in culture medium as carbon source were utilized by the pathogenic isolates. S. scabies isolates (CH1 and CH2) were susceptible to 7% NaC1, antibiotics such as streptomycin sulfate (20 ㎍/㎖) and oleandomycin (100 ㎍/㎖), crystal violet (0.5 ㎍/㎖), and thallium acetate (>10 ㎍/㎖).