Exploration of Plant Growth Promoting Bacteria (PGPB) to Control Pantoea sterwartii subsp. stewartii Causes of Stewart's Wilt Disease in Corn Plants

Pantoea stewartii subsp. stewartii ( Pnss ) is a pathogen that causes Stewart's wilt disease in corn plants, which can significantly reduce production. The purpose of this study was to obtain Bacillus spp. which has the potential to inhibit the growth of P. stewartii subsp. stewartii, the cause of Stewart's wilt disease in planta, in controlling Pnss and increasing the growth of corn plants It has 4 stage . The results of the study showed that the Bacillus consortium has the ability to produce antibiotics that are effective in inhibiting the growth of Pnss, which is seen through the clear zone in the antibiosis test. Bacillus also produces siderophores that can inhibit the growth of pathogens and increase the availability of iron which is important for plant growth. The introduced Bacillus isolates to corn plants can increase plumule length, radicle length, number of radicles, and increase plant production such as number of leaves and cob weight. In addition, the Bacillus consortium can reduce the incidence and severity of Stewart's wilt disease, extend the incubation period of the disease, and reduce the AUDPC value. showed slower disease progression. B. subtilis BPP2at72 and B. mycoides BPP2at71 proved to be the most effective isolates in controlling the disease and increasing corn yield. This study concludes that the Bacillus spp. consortium has great potential as a biocontrol agent and biofertilizer to control diseases and increase corn crop production.