Fungus didn't bend it, whatever brought about the final breaking of the stock bent the tang. I'm sure all of us speculators will find out shortly what really happenend. But I do know that something in the wood doesn't look right. There should be crisp and sharp points to the broken wood, this doesn't have it.

I have a very old pantry box with lid, that has remenants of powder post beetles, and they are mainly in the wood not on it.

David