Which of the following is a preventive measure against powderpost beetle infestations?

Using treated wood is a well-recognized preventive measure against powderpost beetle infestations because treated wood is infused with chemical preservatives that help deter wood-destroying insects, including powderpost beetles. These preservatives make the wood less appealing for beetles to infest, as the chemicals interfere with their ability to feed and reproduce. By incorporating treated wood in construction or woodworking projects, the likelihood of an infestation can be significantly reduced.

In contrast, applying paint may not provide a long-term barrier against beetles, particularly if the paint wears off or is damaged over time. Storing wood outdoors can actually increase the risk of infestations, as outdoor conditions may expose the wood to suitable environmental factors for beetle breeding. Lastly, using reclaimed wood poses a higher risk for infestations, as it may already contain larvae or eggs from previous infestations, making it a less favorable choice for prevention.