No, Bora-Care would not be recommended for treating mushrooms on wood surfaces. BoraCare with Mold Care could possibly be an option but due to the many different type of mushrooms/fungi that can grow on raw wood surfaces, we would suggest contacting your County Extension Office for identifying the type of growth you have and the recommended treatment.
Find your County Extension Office HERE for a positive identification.
Bora-Care can be used at a 5:1 ratio for preventative treatment and will last for the life of the wood.
Yes, it is common to still see evidence after treatment with Bora-care. The beetles lie dormant for years and once they wake up they start consuming the wood, which is when we see the sawdust material. Now that it has been treated with Bora-care, once they consume the wood they will die.
You will need to do 2 application of Bora-Care. After applying first coat you will wait 20 minutes and then add the second coat.