mogga writes
So can I still eat the spuds if it's glycowhatsit or other plantkiller?
Is it worth digging them up?

It's unlikely to be glyphosate because that is a systemic - the plant
has to absorb it into its system first. In other words, you wouldn't see
any effect on the plants for at least a week. So, basically, you don'
know what killed them. I don't think I'd eat them if they were mine.
--
Kay