The present invention relates to a barrier (310) for at least partially surrounding a planted area for repelling gastropods such as slugs. The barrier has a wall arrangement (318) and a ledge (356) extending away from the wall arrangement. The ledge (356) has a plurality of downwardly extending elements (361). The barrier (310) is disposed over ground around a planted area to be protected from gastropods. The wall arrangement (318) and the downwardly extending elements of the ledge (356) are operative to repel gastropods and thereby reduce the likelihood of their reaching the planted area.
