Why might untreated wood be more susceptible to pests?

Untreated wood is indeed more susceptible to pests primarily because it contains no protective chemicals. In many applications, wood is treated with preservatives to fend off insects, fungi, and other pests that can damage it. These chemicals create a barrier that deters pests from feeding on the wood or nesting within it.

When wood remains untreated, it lacks these protective properties, leaving it vulnerable to infestations. Insects like termites are especially attracted to untreated wood, as it serves as a food source without the deterrent effects of preservatives. Furthermore, untreated wood can be more prone to degradation from environmental factors, which may also contribute to its attractiveness to pests.

While other factors like density and moisture absorption can play roles in wood's susceptibility to pests, the absence of protective chemicals is a significant reason why untreated wood becomes an inviting target for various insects.