If you're sure they're wire worms...well, wire wirms do go for spuds so you're almost certain to have some damage. Seeing as how you've already planted, the best thing you can do is lift the spuds as soon as they're ready, don't leave them in the ground any longer than you need to.
Wire worms only make holes, they don't hollow out the tubers so although you might find yourself cutting out some damage, the rest of the spud is still useable.
Last year I brought n a new area into use and wire worm can be a problem on new ground for a couple of years or so. Best method is probably to treat the ground at planting time (pick your poison). I grew mustard and dug it in after lifting my spuds. I've put onions in that same ground this year. (Mustard is a brassica so shouldn't be followed with the cabbage family).
I saw no sign of wire worm as I prepared the onion bed so maybe the mustard worked?
