Which infection mechanism is associated with the feeding behavior of the Bronze Birch Borer?

The Bronze Birch Borer (Agrilus anxius) affects birch trees through a specific feeding mechanism that directly interferes with sap movement within the tree. As this wood-boring beetle larvae tunnel through the cambial layer of the tree, they disrupt the vascular system, which is crucial for transporting nutrients and water. This damage can lead to a decline in tree health as the tree struggles to maintain the necessary flow of sap, ultimately causing stress and potentially leading to death if the infestation is severe.

In this context, the mechanism associated with their feeding behavior is best understood as interference with sap movement. When the larvae create tunnels and feed, they not only damage the physical structure of the tree but also inhibit its ability to transport vital fluids, which can manifest as wilting, reduced growth, or other forms of decline.