Carpeting over borer affected floorboards

Are you looking for advice about carpet or replacing the floorboards. If carpet get some meter square carpet tiles from

Bunnings. If floorboards there is plenty of places in Melbourne for second hand floor boards. What type are they?

Arrrgh. Sorry about that, no wonder I haven't had many replies, what a hopeless question. It seems that half of my post text didn't make it ??? Ok, so here's the full story.

Some of the rooms I'm keeping bare boards and replacing those completely so they look the part.

The other rooms that I want to carpet have baltic pine floorboards that are affected by borer. I'm told that it was the kind of borer that feeds when the wood is green then departs. So there's no insects present, just the damage caused by them. I want to lay down carpet in certain rooms, but the wood's pretty soft in spots, like you could put your foot through it if you stamped hard enough. I'm wondering if I should.

1. replace them completely with chipboard.
2. patch repair them with baltic (that I have spare from the stuff i've already replaced) where they are bad.
3. treat them in some way that fills them and strengthens them.

Thanks for your help.

I would go for option 2 Baltic pine is an easy repair and boards are easy to get in Melbourne If you replace the full length they look good