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 Fraser Douglas Fraser Douglas Andrew Fraser (December 18, 1916 – February 23, 2008) was a Scottish-American union leader. He was president of the United Auto Workers from 1977 to 1983 and an adjunct professor of labor relations at Wayne State University for many years. He is best remembered for helping to save Chrysler from bankruptcy in 1979 by heavily lobbying the US Congress for a loan and convincing workers to make concessions. Fraser was born in Glasgow, Scotland, on December 28, 1916. His father, Samuel, was an electrician and an active and vocal trade unionist. The family was so poor that