Arief Widyantoro, Hadiwiyono, Subagiya
Graduate School of Agronomy, Universitas Sebelas Maret in Surakarta, Jl. Ir. Sutami 36A, Solo, Indonesia
Fusarium wilt caused by Fusarium oxysporum F. 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 vitro to 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. Streptomyces and Bacillus were able to inhibit the growth of FOC colony at 80.45 and 87.71% respectively. Combination of Azotobacter to Streptomyces is compatible as well as Azospirillum to Bacillus. Azotobacter to Azospirillum is incompatible as well as Streptomyces to Bacillus.
Keywords: Banana, Azotobacter, Azospirillum, Streptomyces, Bacillus