The present invention is relative to an agrochemical composition comprising as herbicidal substance a combination of a phenylpyridazine derivative and a triketone, a defined solvent, and a surfactant system comprising a non ionic and an anionic surfactant. The invention also concerns a process for the preparation of said agrochemical composition, an agrochemical emulsion or suspoemulsion obtainable by diluting said agrochemical composition and a method of controlling undesired vegetation using said agrochemical composition.