Synergistic compositions comprising: one component (A), consisting of the compound having formula (I) 3-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-1-methyl-4-pyrazolecarboxamide one or more components (B) having a fungicidal or insecticidal activity, and their use for the control of of harmful insects in agrarian crops.COMPOSICION SINERGICA PARA LA PROTECCION DE CULTIVOS AGRICOLAS QUE COMPRENDE UN COMPUESTO DERIVADO DE CARBOXAMIDA Y UN SEGUNDO COMPUESTO ACTIVO. USO DE LA COMPOSICION Y METODO PARA EL CONTROL DE HONGOS E INSECTOS PERJUDICIALES