Which type of wood decay is characterized by a bleached appearance and zig-zag lines when young?

The type of wood decay characterized by a bleached appearance and zig-zag lines when young is white rot. This form of decay is caused by fungi that degrade both lignin and cellulose in the wood, which differentiates it from other decay types that may only attack one component. The bleaching effect occurs as the fungi break down the lignin, leading to a lighter color of the wood.

The zig-zag lines observed in white rot are indicative of the pattern of fungal growth and decay within the wood, giving it a distinctive appearance. This can be particularly useful for identification in the early stages of decay. Understanding these characteristics plays a significant role in pest control and wood preservation, as it aids those in the field in assessing the extent of wood damage and deciding on appropriate treatment methods.

Identifying white rot is crucial not only for the treatment of affected structures but also for early intervention strategies that can prevent further damage, making knowledge of its visual signs valuable for structural pest control operators.