Tom from Rehoboth writes
When treating raw wood for active beetles, it is not recommended to use Timbor Professional. Instead, you should use Boracare which penetrates deeper into the wood and can be used for active problems vs just preventative like the Timbor is designed to do. That being said, even if Boracare was used, you would still see signs of powder post beetles after treatment. This is normal and expected since the eggs/larvae can lay dormant in the wood for years. The signs you are seeing of dust and holes are the ones that have progressed into an adult beetle and are eating their way out of the wood. As they eat their way out, they are ingesting the borate-treated wood and will die from it, which keeps new infestations or reinfestations from occurring. Seeing signs after treatment does not mean the treatment failed, it simply means those insects are still emerging to be impacted by the chemical. Boracare and Timbor kill through ingestion of the chemical, not through simply contacting a treated surface.
Answer last updated on: 07/24/2024
