The present invention relates to aqueous suspension concentrate formulation for plant protection comprising: 2-chloro-5-[3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1-(2H)pyrimidinyl]-4-fluoro-N-[[methyl(1-methylethyl)amino]sulfonyl]benzamide in the form of its crystalline anhydrate； at least one non-ionic surfactant selected from polyoxyethylene-polyoxy-C3-C4-alkylene block copolymers； at least one anionic surfactant comprising at least one arylsulfonate group； and water； wherein the pH value of the formulation is in the range of 3 to 7.
