Soybean root rot was caused by several pathogens. The results showed that there were 7 pathogens, Among them, F. oxyspontm can be isolated with highest frequency, and it' s a main pathogen.
PD liquid medium was suitable for F.oxysporum growth and PSC liquid medium was the best for the toxin production. The optimum culture condition for F.oxysporum growth was at 20~30 , pH6~7, darkness, and toxin production of F. oxysporum was 25~30癈, 15d, light, continuous shock; and pH was no signifi...