The disclosure relates to a new crystalline form of 3-(Difluormethyl)-1-methyl-N-(3',4',5'-trifluor[1,1'-biphenyl]-2-yl)-1H-pyrazol-4-carboxamide. The disclosure also relates to processes for the production of this crystalline form and formulations for plant protection which contain the crystalline form of 3-(Difluormethyl)-1-methyl-N-(3',4',5'-trifluor[1,1'-biphenyl]-2-yl)-1H-pyrazol-4-carboxamide. A process for the production of the crystalline form B comprises:(i) preparation of a solution of 3-(Difluormethyl)-1-methyl-N-(3',4',5'-trifluor[1,1'-biphenyl]-2-yl)-1H-pyrazol-4-carboxamide in an organic solvent which is selected from methanol, ethanol, 2-propanol, cyclic ethers, acetic acid, aprotic solvents and aromatic solvents, at 50 to 130 Deg C, (ii) cooling the solution at a rate between 20 Deg C/hour and 0,1 Deg C/hour to a temperature between 70 Deg C and (-20) Deg C, and (iii) separation of form B from the mother liquor.
