What do larval galleries of the Flatheaded borer typically look like?

The larval galleries of the Flatheaded borer are indeed characterized by a distinctive appearance that includes being flat and often containing packed debris or frass, which looks like small pellet-like material. This is due to the feeding habits of the larvae as they tunnel beneath the bark of trees, primarily in the cambial layer where they create galleries that are flattened rather than round.

The presence of these packed pellets in the galleries serves as an indicator of the Flatheaded borer's activity, which contributes to the identification and management of this pest. The flat nature of these galleries, along with the accumulation of frass, differentiates them from the tunnels made by other wood-boring insects, which may have different shapes or characteristics. Understanding this unique gallery structure is crucial for pest control professionals when diagnosing infestations and determining appropriate treatment methods.