Abstract“Pest” is frequently defined as anything that causes trouble, annoyance, or discomfort. Almost everyone hears about the benefits of trees for the urban environment. If management recognizes the pest potential of the urban forest, it can be the asset it was intended to be in our urban areas. Urban forests and trees usually become a pest (1) when the tree selection for planting did not consider the space available for growth and other needs and wants of the urban area, and (2) when other needs and wants of the urban area conflict with the space occupied by the existing urban forest.