As used in this chapter:
(1) "Commission" means the county legislative body of each county of this state.
(2) "Commissioner" means the commissioner of agriculture and food or the commissioner's representative.
(3) "County noxious weed" means any plant that is:
(a) not on the state noxious weed list;
(b) especially troublesome in a particular county; and
(c) declared by the county legislative body to be a noxious weed within the county.
(4) "Noxious weed" means any plant the commissioner determines to be especially injurious to public health, crops, livestock, land, or other property.