All of the five cell wall-degrading enzymes,including PG,PMG,PGTE,PMTE and Cx,could be found in Brazil banana inoculated by banana wilt fusarium race 4 and Chinese banana inoculated by banana wilt fusarium race 1.PG activity was the highest.Under the condition of being cultured with seven different carbon sources,the dry weight of mycelium biomass from Foc 4 was lager than that from Foc 1,which means Foc 4 grows more quickly and is more adaptable.With the presence of citrus pectin or PGA,the two strains significantly induced PG activity.When using CMC or glucose as the sole carbon source,the PG activity of the two strains was very low.The PG activity of Foc 4 was higher than that of Foc 1 in the musa vascular tissue culture,while the PG activity of Foc 4 was lower than that of Foc 1 in the Chinese banana vascular tissue culture.With citrus pectin as a carbon source,both Foc 1 and Foc 4 can produce PG activity,but they produced lower PG activity than they did without nitrogen source.