Screening of Antagonistic Bacteria against Fusarium oxysporumf.sp.cubense in Banana

Thirty-three antagonistic bacterium stains against Fusarium oxysporum f.sp.cubense were isolated from the soils of banana,and tested about their inhibitive efficiency to the hyphal growth and conidial germination.The result showed that the antagonistic bacterium strains G1,G3,F1,F3,and I1 had significant inhibition to Fusarium oxysporum f.sp.cubense,the induced zone of inhibition ranged from 10.33-48.33mm in diameter on PDA plates,and the inhibition rates to conidial germination ranged from 92.50% to 98.22%.The studies on the action mechanisms of the antagonistic bacteria demonstrated that they could inhibit conidial germination and distort the germ tubes of the conidia of the pathogens.