The present invention relates to a method of inducing plant tolerance to harmful fungi comprising the application to the plants, the soil, in which the plant grows or is to be grown and/or the seeds of the plant, of an effective amount of an active compound that inhibits the mitochondrial breathing chain at the level of the b/c<;SUB>;1 <;/SUB>;complex.本發明係關於一種引發植物對有害真菌之耐受性的方法,其包含對植物、其中生長或待生長該植物之土壤及/或該植物之種籽施用有效量之活性化合物,該活性化合物在b/c1複合物層面上抑制粒線體呼吸鏈。