FarmerGiles said:

has anyone come across a possible virus/disease presenting on potato
leaves. it begins as a white raised area on the leaf, which then
spreads leaving holes on the leaf. the holes are surrounded by a
white/yellow ring.

You've got tohope it isn't late blight...

Though this is a diagnostic for tomato leaves, it might help:

http://aggie-horticulture.tamu.edu/t...ves/index.html

--
Pat in Plymouth MI ('someplace.net' is comcast)

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)