What is a notable characteristic of white rot?

White rot is characterized by the breakdown of lignin in wood, resulting in a fibrous and spongy texture. This type of decay is caused by specific fungi that decompose both lignin and cellulose, leading to a significant alteration of the wood's structural integrity. As the wood fungus degrades the lignin, it softens the wood, making it more pliable and less rigid, which contrasts sharply with the other characteristics listed.

The fibrous sponging effect is a defining trait, and it indicates the advanced decay stage where the wood appears white and has a soft, crumbly texture as opposed to being solid and hard. Recognizing this characteristic is essential for pest control operators when assessing the impact of fungal decay on wooden structures.

In contrast, other choices either describe incorrect implications of wood decay or focus on characteristics that do not pertain to white rot. For instance, the idea that white rot causes wood to become very hard or strengthens the wood structure fundamentally misunderstands the implications of fungal decay, since it actually compromises the integrity of the wood.