In case the shipment, although apparently sound and not infested or infected by any pests, is from an infested or infected district beyond the limits of this state, the inspector shall notify the owner or person in charge thereof, and shall require such owner or person to fumigate or sterilize such shipment, or to destroy or to treat such shipment in the manner directed by the inspector and under the supervision of the inspector or under the supervision of some person appointed by the inspector for that purpose, or to return it to the point of origin or ship out of the state.