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David from North Georgia writes

Can Boracare be applied over Timbor?

I had my workshop professionally treated for active powderpost beetles and they used Timbor. However, after 4 months they are still active! They are in rough cut pine 4x8 ceiling joists. I have read Boracare is better for penetration. Should I retreat with Boracare myself or a second coat of Timbor. I am also confused about how long it takes ppb to die. I know they have to eat to the borax first. Should I just wait?

Answer:

Bora-Care is always the recommended product for treating active Powderpost Beetles because it penetrates deeper into the wood, up to 8 inches with 2 applications.  Timbor will only go about 1/4 inch so it will not get to the larvae already in the wood.  Bora-Care can take up to 30 days or more to penetrate all the way through a piece of wood and this will vary depending on how thick the wood is and the moisture content.   We would recommend applying the Bora-Care and not a second application of Timbor.  The larvae stage in the life of the Powderpost beetle is the longest, lasting from 1 to 10 years before it will mature to adulthood so it can take time to completely erradicate them. Please take a moment to read over our article on How to Get Rid of Powderpost Beetles.

Answer last updated on: 06/21/2014

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