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The chemical has a pleasant characteristic odor. Besides being a natural constituent of plants, it and its analogs are insect pheromones. In particular, verbenone when formulated in a long-lasting matrix has an important role in the control of bark beetles such as the mountain pine beetle and the Southern pine bark beetle.
Massive outbreaks of mountain pine beetles in western North America after about 2005 have killed millions of acres of forest from New Mexico to British Columbia. [20] Bark beetles enter trees by boring holes in the bark of the tree, sometimes using the lenticels, or the pores plants use for gas exchange, to pass through the bark of the tree. [3]
Ips pini, also known as the pine engraver or North American pine engraver, is a species of typical bark beetle in the family Curculionidae found primarily in North America. These beetles are subcategorized by the distinctive geographic ranges in which they are found.
On a recent excursion, Campbell Vaughn couldn't help but notice the devastation of pine trees in local forested areas due to the southern pine beetle.
A lodgepole pine tree infested by the mountain pine beetle, with visible pitch tubes. Beetles develop through four stages: egg, larva, pupa and adult.Except for a few days during the summer when adults emerge from brood trees and fly to attack new host trees, all life stages are spent beneath the bark.
The bark beetle is an insect of the subfamily Scolytinae, containing around 6000 species, which live and reproduce in the inner bark of trees.Upon successfully entering a tree, they mate and the female starts to burrow a labyrinth of tunnels running along the inner bark called egg galleries where she then lays her eggs.