What type of wood does Lyctid primarily feed on?

Lyctid beetles, commonly known as powderpost beetles, primarily feed on the sapwood of hardwoods. This specific preference arises from the fact that the larvae of Lyctid beetles require the starches present in the sapwood for their development. Hardwoods, such as oak, ash, and maple, contain more starch compared to softwoods, making them more suitable for these beetles. The beetle's ability to bore into the wood and create fine powder-like frass is indicative of its feeding habits, particularly in freshly cut hardwood that has not been treated or properly seasoned.

Understanding that Lyctid beetles do not typically infest softwoods or old wood helps clarify their specific wood preferences. Softwoods like pine and fir lack the necessary starch content that Lyctids need for larvae development, while older wood might be too dry or unsuitable after treatment or aging. Therefore, the statement that they feed on the sapwood of hardwoods only aligns accurately with their biological and ecological characteristics.