Total DNA of the 2 pathogens and their similar ones digested with EcoR I, were hybridized with mtDNA probes of 2ul8 and 4u40 by Southern blot, the RFLP patterns could identify F.

• 利用Southern杂交技术；将致病菌和近似菌的基因组DNA分别用EcoRI 酶切；与mtDNA探针2u18和4u40杂交的RFLP图谱可成功的鉴定F.