Wood Destroying Organism (WDO) Home Inspection Practice Exam

Most beetles do not develop in wood whose moisture content is below what percentage?

1. 60 to 80%

2. 35 to 45%

3. 10 to 15%

4. 15 to 20%

The correct answer is: 10 to 15%

The correct answer is based on the fundamental understanding of beetle biology and wood moisture requirements for development. Most wood-destroying beetles, particularly those that infest dry wood, require a minimum moisture content within the wood to successfully lay their eggs and for their larvae to mature. Research indicates that this moisture threshold typically falls between 10 to 15 percent. Below this percentage, the environment becomes too dry for many species to survive and develop effectively, leading to a decrease in beetle infestations. Wood with a moisture content under 10 percent is generally considered too dry to support the lifecycle of most beetle species, which explains why this is the correct choice. Understanding this moisture level is crucial for professionals conducting inspections for wood-destroying organisms, as it informs their assessments regarding potential infestations and the conditions necessary for beetle activity. This knowledge also assists in recommending proper moisture management practices to homeowners to mitigate risks associated with these pests.