without the application of BIOs (F= 109.142,df=4,
10,P=0.0001). When FOC populations were above 3
×10
4
CFU g
−1
in the rhizosphere soil, the disease incidence rate was higher than 90% (Figs. 1 and 3). Supplementation with BOI1 significantly decreased the number of FOC in the rhizosphere soil to 1×10
4
CFU g
−1
;
while the application of the specific BIOs for banana,
made by the combination of matured compost and the
antagonist isolated from banana planted soil (named as
BIO2–4), could further decrease the number of FOC to
lower than 7 ×10
3
CFU g
−1
in the rhizosphere soil.
The lowest population of FOC (2×10
3
CFU g
−1
)was
obtained in the T3 treatment