Abstract Xanthomans oryzae pv. (Xoo) is a pathogen that causes bacterial leaf blight in rice plants.Biological control using microorganisms, one of which incorporates actinobacteria, the most extensively used techniques. This work aimed to find actinobacteria isolates from can inhibit Xoo growth vitro. A Completely Randomized Design (CRD) was employed this experiment, with 14 treatments and thr...