Hairy Potato Chits???!!!

[Tee Gee]

very fine white hairs over the chits

Are the 'over' as you say or are they under the chits just above the potato?

If they are the latter they are most likely embryo roots.

Think of it this way; when a haulm (stem) grows,  roots form at the base of it and the potatoes form on these roots.

The chit is just the start of that stem  so these roots are just premature roots, the new potatoes will eventually form on these and the seed potato will rot away!

At least that what I think although a picture would have helped me to diagnose the problem better.

[Tee Gee]

[posie]

Are the 'over' as you say or are they under the chits just above the potato?

If they are the latter they are most likely embryo roots.

That sounds exactly it Tee Gee, it's on all of the spuds and having looked at them with a magnifying glass now, it's definitely not mould, but very very fine white hairs.  Mystery solved.  Well apart from which 1 to plant first rofl.

[GrannieAnnie]

Put 'em in the dark and you'll end up with this...!
[attachment=1]

How do you untangle all those roots?!