What type of damage is typically caused by larvae of the Old House Borer?

The larvae of the Old House Borer cause damage characterized by ripple-like ridges on wood surfaces. As they feed on the wood, they create irregular channels that produce these distinctive ridges, which can be an important indicator of their presence. This type of damage is often more subtle compared to large holes or fine powder, but it can still compromise the integrity of wooden structures over time.

The presence of ripple-like ridges suggests that the larvae are actively tunneling through the wood, leaving behind evidence of their feeding habits. Recognizing these signs is crucial for pest management and structural assessment. In contrast, large holes typically indicate the activity of other wood-boring insects, fine powder is more commonly associated with powderpost beetles, and surface scratching does not signify the level of infestation and damage that larvae of the Old House Borer can cause. Therefore, understanding the specific characteristics of the damage they inflict is essential for effective identification and treatment.