The invention relates to active compound combinations, in particular within a composition, which comprises (A) an amidine compound of formula (I) and a further fungicidally (B-1), insecticidally (B-2) active or plant growth regulating compound (B-3). Moreover, the invention relates to a method for curatively or preventively controlling the phytopathogenic fungi of plants or reducing the mycotoxin contamination of plant or plant parts, to the use of a combination according to the invention for the treatment of seed, to a method for protecting a seed and not at least to the treated seed.