Originally Posted by Treecreeper1961
Perhaps not as effective as treating softwood then.
If you are using untreated hardwood (oak or sweetchestnut) then it wood provide protection above the natural resistance of the timber.
No but most treated softwood is done badly. The stake fails and gets abandoned or worse burned. At least chestnut degrades gracefully. Old chestnit fencing is also good firewodd as though it dries slowly it resists re wetting, so the above ground bit remains dry. I'm burning some old pales at home now. Surprising for a May bank holiday.
I reiterate charring is likely to reduce the life of the stake.