What is the primary issue with stump worms in white oak?

• A. They are easily detected in veneer-sized trees.
• B. They are generally not detectable in veneer-sized trees and do not damage the outer, more valuable portion of the tree.
• C. They cause visible cosmetic damage on the bark.
• D. They increase the value of the logs.

Answer: (B)

Hidden pests that live in the interior of a tree can be a bigger concern for how we evaluate timber than what we see on the surface. Stump worms in white oak tend to attack the interior heartwood and the stump area, not the outer layers that are used for veneer. Because veneer-grade logs are valued for their outer surface quality, damage that stays inside the log without showing on the bark or outer wood often goes undetected in veneer-sized trees. That means the infestation can be present while the outer, more valuable portion looks sound, making detection the main issue. In contrast, cosmetic bark damage would be a visible sign, and damaging the outer wood would directly affect veneer quality, which isn’t the typical problem with stump worms. They also don’t increase log value; they lessen quality internally rather than adding value.