What color stains do Ambrosia Fungus galleries typically exhibit?

Ambrosia fungi are associated with certain wood-boring beetles, particularly those in the Scolytinae subfamily. The galleries created by these beetles within the wood usually have a distinct coloration due to the action of the fungus. Specifically, the galleries exhibit colors such as blue, dark grey, dark brown, or black. This staining occurs because the fungi break down the wood’s lignin and cellulose, leading to the dark pigmentation often observed in the infected wood.

The correct answer reflects the most common color variations found in ambrosia fungus galleries, which are used to help identify the presence of these beetles and the associated wood damage. Understanding the color of the staining can be essential for pest control operators to assess the extent of infestation and take appropriate action to mitigate damage to wooden structures.