ROS inducer 1 (compound I 29 ) is a fungicide, with EC 50 against Xanthomonas axonopodis pv. citri (Xac), Xanthomonas oryzae pv. oryzae (Xoo), and Pseudomonas syringae pv. actinidiae (Psa) of 5.73, 6.62 and 9.05 μg/mL. ROS inducer 1 can effectively induce the production of ROS in Xanthomonas cells and inhibit rice bacterial blight. ROS inducer 1 has the potential to study bacterial infection in crops.