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Raymond from San Francisco, Ca writes

I see exit holes 1/16" on my non lad 6x6x8 ft. beam. There is 1 painted surface. I suspect wood boring beetles. Can I use Boracare?

I have 3 surfaces that I can treat.  Possible wood beetles?  I was thinking of drilling a series of ¼ dia c 2' deep holes at random and filling with Bora-Care solution or a product that you can recommend and then plug holes at a later date.  Thanking you in advance.


Bora-Care would be the best product to use, applied twice to the three surfaces you can get to.  It will penetrate up to 4 inches with 1 application, and up to 8 with 2.  If you choose to drill you should drill whatever size hole you need based on what you have available to inject the Bora-care with.  Typically if you have an injection piece of equipment, 1/4 inch or 1/8 inch holes are used.  Please see this technical bulletin from the manufacturers of Bora-Care that explains about drilling and injecting into wood.  See page 5 and it will give specifics about the drill pattern, etc.  Bora-Care Remedial Technical Bulletin

Answer last updated on: 10/06/2018

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