What happens to tree trunks when infested by Asian longhorned beetles?

When tree trunks are infested by Asian longhorned beetles, they form galleries and tunnels within the wood. This occurs because the larvae of the beetle bore into the bark and then tunnel through the inner wood, creating extensive galleries as they feed. These tunnels disrupt the tree's vascular system, which can lead to decreased nutrient and water transport. This process weakens the tree, making it more susceptible to disease and other pests, and can ultimately result in the tree's death if the infestation is not managed.

The formation of galleries is a key indicator of infestation by this species and highlights the destructive impact that invasive pests can have on forest ecosystems. Understanding the biological interaction between the Asian longhorned beetle and its host trees is essential for effective management and conservation efforts.