Antibacterial activities of decyl alcohol (DA) and 3,5,5‐trimethylhexanol (TMH) against Xanthomonas oryzae pv. oryzicola (Xoc), Pseudomonas syringae pv. tomato DC3000 (Pst) and Ralstonia solanacearum (Rs); 0.48 mg DA [dissolved in 100 µL dimethylsulfoxide (DMSO)], 2.4 mg TMH (dissolved in 100 µL DMSO) and DMSO were added to one compartment of the divided plates containing Luria broth (LB) medium; Xoc, Pst and Rs were cultured in a separate compartment containing nutrient agar (NA) or King's B (KB) medium. The diameters of Xoc, Pst and Rs colonies were measured after exposure for 14, 4 and 4 days, respectively. Three independent replicates of each experiment were performed.