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I have a twenty-old-log home, not sure when it was last treated for insects. Pressure washed then applied wood guard with UV stain treatment 2 wks ago. Now noticing small, flying ‘bee-looking’ insect going in/out of holes that were already there. Haven’t noticed any new holes. These bugs are very small, about 4-6mm long with yellow and black striped abdomen. Are these parasitic insects or did they make the hole? They aren’t carpenter bees because they are very tiny. What would you suggest fo

Sounds like Powder Post Beetles. There is not much you can do at this point. The home needs to be striped down to bare wood and have a borate treatment applied. This can only be done on bare wood. You should never power wash your log home. It drives the water so deep into the wood fiber that it will not dry out properly. If you do you should wait at least 2 months for it to dry out as much as possible.

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