The present invention relates to a bait system comprising a rodent bait, which is packed in a biodegradable foil containing polyester and starch. The present invention also relates to a method for controlling rodents, comprising the steps of a) packing said rodent bait in said biodegradable foil, and b) offering the packed bait to rodents. It also relates to a bait system comprising, as separate components, a) said rodent bait, and b) said biodegradable, for combined use in controlling rodents.
