Liquid Copper Fungicide
A few years ago, Spruceman wrote a summary of his ideas about liquid copper fungicide as a possible aid in preventing rot in tree wounds. For some reason, that thread no long shows up in searches. I was actually able to go there, through my own direct link, and post to the thread, but the thread still doesn't show up in the forum, even when I refresh the page multiple times. It's weird. Anyway, here is a link to that thread for anyone searching for it in the future.
Here is a link that might be useful: Preventing Wood Rot in Trees--Liquid Copper Fungicide