The city council, or its authorized representatives, are hereby empowered to superintend, regulate and encourage the preservation, culture and planting of shade trees, plants and shrubs upon city owned property, and to direct the method and time of trimming the same; to advise, without charge, owners and occupants of lots regarding the kind of trees, plants and shrubs, and the method of planting best adapted to and most desirable on particular streets and public highways; and to take such measures as may be deemed necessary for the control and extermination of insects, pests and plant diseases which may injuriously affect trees, plants and shrubs that are now growing or hereafter may be growing on the public highways and parks of the city. (Ord. 827, 9-5-2000)