A method of inducing tolerance of plants against bacterioses which comprises treating the plants, the soil or seeds with an effective amount of a combination of a compound of the formula I in which X is halogen, alkyl or trifluoromethyl; m is 0 or 1; Q is C(═CH—CH3)—COOCH3, C(═CH—OCH3)—COOCH3, C(═N—OCH3)—CONHCH3, C(═N—OCH3)—COOCH3, N(—OCH3)—COOCH3, or a group Q1  wherein # denotes the bond to the phenyl ring; A is —O—B, —CH2O—B, —OCH2—B, —CH2S—B, —CH═CH—B, —C≡C—B, —CH2O—N═C(R1)—B, —CH2S—N═C(R1)—B, —CH2O—N═C(R1)—CH═CH—B, or —CH2O—N═C(R1)—C(R2)═N—OR3, where B is phenyl, naphthyl, 5- or 6-membered hetaryl or 5- or 6-membered heterocyclyl, containing one to three N atoms and/or one O or S atom or one or two O and/or S atoms, the ring systems being unsubstituted or substituted as defined in the description; R1 is hydrogen, cyano, alkyl, haloalkyl, cycloalkyl, alkoxy, or alkylthio; R2 is phenyl, phenylcarbonyl, phenylsulfonyl, 5- or 6-membered hetaryl, 5- or 6-membered hetarylcarbonyl or 5- or 6-membered hetarylsulfonyl, the ring systems being unsubstituted or substituted by one to three radicals Ra, C1-C10-alkyl, C3-C6-cycloalkyl, C2-C10-alkenyl, C2-C10-alkynyl, C1-C10-alkyl-carbonyl, C2-C10-alkenylcarbonyl, C3-C10-alkynylcarbonyl, C1-C10-alkyl-sulfonyl, or C(═NORA)—RB, the hydrocarbon radicals of these groups being unsubstituted or substituted as defined in the description; R3 is hydrogen, C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkynyl, the hydrocarbon radicals of these groups being unsubstituted or substituted as defined in the description; and a second active compound as defined in the description; which is taken up by the plants or seeds.