Cassava is an economic plant which can make the 4th highest income to Thailand from exporting. One problem usually occurs to cassava farming is decease from plant pests, especially the cassava bacterial blight caused by the Xanthomonas axonopodis pv. manihotis. The SLRI and SUT research teams recently studied on overcoming of cassava bacterial blight by having planting stems immersed in Bacillus amyloliquefaciens and analyzed them by Infrared microscopy.The study results showed that having planting stems immersed in that bacteria assisted them to resist the Xanthomonas axonopodis pv. manihotis. By this method, cassava roots, stems and branch tips had fast growth which leaded to higher products and cassava flour. Moreover, this bacterium also assisted accumulated fertilizers or nutrients in soil to be benefit to cassava plants as well.