Antagonism and compatibility of biofertilizer bacteria toward Fusarium oxysporum F. sp. Cubense

Fusarium wilt caused by Fusarium oxysporumF.sp. cubense (FOC) is an important disease on banana. Fusarium wilt was hard to control because the pathogen can survive in many kind of soils type although there is no host. Therefore, overcoming the disease is urgently needed to develop such as biological control. Biofertilizer bacteria, such as Azotobacter, Azospirillum, Streptomyces and Bacillus were begun to use as antagonist agent to the pathogen. This research aimed to study the mechanism of antagonism of the biofertilizer bacteria toward FOC. There were 4 isolates examined in vitroto test the production of chitinase, pectinase, and antagonism. The research showed that all isolates of biofertilizer bacteria were able to produce chitinase and pectinase except Azospirillum. Streptomycesand Bacillus were able to inhibit the growth of FOC colony at 80.45 and 87.71% respectively. Combination of Azotobacterto Streptomyces is compatible as well as Azospirillumto Bacillus. Azotobacterto Azospirillumis incompatible as well as Streptomyces to Bacillus.