Whenever any competent city authority or competent state or federal authority shall file with the governing body a statement in writing based upon a laboratory test or other supporting evidence that trees or tree materials or shrubs located upon private property within the city are infected or infested with or harbor any tree or plant disease or insect or larvae, the uncontrolled presence of which may constitute a hazard to or result in the damage or extinction of other trees or shrubs in the community, describing the same and where located, the governing body shall direct the City Clerk to forthwith issue notice requiring the owner or agent of the owner of the premises to treat or to remove any such designated tree, tree material or shrub within a time specified in the notice.