Bark beetles are common pests of conifers and some attack broadleaf trees. Several hundred species occur in the United States. The species of tree attacked and the location of damage on the bark help in identifying the bark beetle species present. On pines, for example, engraver beetles usually attack trees near the top, while red turpentine beetles attack pine trunks near the ground as well as below ground on the large roots. Engraver beetles are dark brown, cylindrical, and have a scooplike depression lined with stout spines at the end of the abdomen. Red turpentine beetles are larger than engraver beetles and reddish brown; their presence is indicated by large, pinkish brown to white pitch tubes, a mixture of pine sap and beetle boring dust that appears on the lower trunk

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