Biological Control Effect of Treating Avirulent Bacteriocin-Producing Strain of Pseudomonas sozanacearum Adapted to Low Temperature on Tobacco Bacterial Wilt

비병원성 Bacteriocin 생성 Pseudomonu solonueomm의 저온성 균주를 이용한 담배 세균성마름병 방제효과

Effect of an avirulent bacteriocin-producing strain(ABPS) of Pseudomonas solanacearum adapted to low temperature on the control of tobacco bacterial wilt was examined under the natural field conditions. The ABPS of p. solanacearum were succeeding-cultured at gradually low temperature, 3$0^{\circ}C$ to 13$^{\circ}C$. The isolates adapted to low temperature grew faster than the wild type either in artificial media or on the tobacco rhizoplane. The control effect of one of the isolates on bacterial wilt was higher than that of the wild type when the bacterial suspension had been poured onto the tobacco rhizosphere soil on 1 day before and 15 days after transplanting to the field. It was suggested that ABPS of p. solanaceamm adapted to the low temperature, might be more effective biological control agent than the wild type.