The novel active compound combination comprising:2- [2-(1-chlorocyclopropyl)-3-(2-chlorophenyl)-2-hydroxypropyl]-2,4-dhiydro-[1,2,4]-triazole-3-thione of the formula:(see formula I);and the active compound imidacloprid of the formula (XXII):(see formula XXII)has very good fungicidal properties.