Christmas tree pests and weeds of different pests, most of which cause cosmetic damage to the trees, important in the Christmas tree industry. The balsam woolly adelgid ("Adelges picae") are small soft-bodied insects which attack the Fraser fir. The insects appear as white, woolly spots on the tree and are fatal to the fir if left untreated. The woolly adeligid was native to central Europe where it affected the silver fir; it was introduced to the United States, where it has no known native predators, before 1900. Balsam twig aphids ("Mindarus abietnus") are another type of tree pest which affects fir and spruce trees in
Douglas Ranges of 1857-1860, which used the Harrison River and Harrison Lake as part of a route to the Interior, the Douglas Road. They are not named directly for the colonial Governor, Sir James Douglas, but for the port and road that bore his name. Douglas Ranges The Douglas Ranges are a subrange of the Pacific Ranges of the Coast Mountains of the Canadian province of British Columbia, about east of downtown Vancouver, north of the Fraser River and between the valleys of Stave and Harrison Lakes. They are approximately in area. Their highest peak is Mount Robertson , at the northwest