A herbicidal composition comprising: a) a herbicide compound A, which is selected from the group of imidazolinones； and b) an adjuvant B, which is a surfactant selected from the groups b1 to b5: b1) a nonionic surfactant of the formula R1Xn and polyalkoxylated derivatives thereof, wherein R1 is selected from aliphatic or aromatic residues having at least eight carbon atoms； X is selected from hydroxy, &mdash；O&mdash；(C1-C6-alkyl), &mdash；O&mdash；(C3-C6-alkenyl), amine, amide, or ester； and n is 1, 2, 3, 4, 5 or 6； b2) an anionic surfactant of the formula R1Yn, wherein R1 is selected from aliphatic or aromatic residues having at least eight carbon atoms； Y is selected from carboxylate, sulfonate, sulfate, phosphate, or phosphonate； and n is 1, 2, 3, 4, 5 or 6； b3) a cationic surfactant； b4) a zwitterionic surfactant； or b5) a polymeric surfactant； and wherein the weight ratio of the herbicide compound A and the adjuvant B is from 2:1 to 1:60； and the use of the said compositions for controlling undesirable vegetation.
