The document discusses several tree pests including the Asian Longhorn Beetle, Emerald Ash Borer, Gypsy Moth, and Western Pine Beetle. The Asian Longhorn Beetle is native to China and was transported to the United States in infested packing material. The Emerald Ash Borer has killed over 20 million trees in several US states and Canada, and firewood quarantines aim to prevent further infestations. The Gypsy Moth, first detected in the US in 1870, prefers oak and aspen trees as hosts, and its larvae can defoliate trees, though small mammals and birds prey on the larvae. The Western Pine Beetle infests ponderosa and Coul