The commissioner is hereby authorized to stop the delivery of, destroy, stop sale, to seize, to treat or to order returned to point of origin, at the owner's expense, any nursery stock or any article or material whatsoever transported or moved within this state or being transported into this state from any place outside thereof, if such nursery stock, article or material is found by him to be infested or infected with any dangerous plant pest or other insect or noxious weed or is in violation of any part of this article whether or not there is attached a valid certificate of inspection.