Potato Leaf Trouble Already

[kath]

This a.m. I found these few bad leaves on Yukon Gold and Red Norland plants. All the rest are still pristine as are all the other varieties. I've searched a bit but haven't found a match for either problem and wonder if anyone might be able to help with the i.d. in case I should spray something this evening. They haven't been sprayed with anything but kelp & Spray-N-Grow once and that was a while ago because of the recent wetness of leaves/full sun situations that have occurred when I could have sprayed.

The cripsy brown leaf tip problem in the first pic was on the YG and the watery looking wetness along the leaf edges (top & bottom, 2nd & 3rd pic) was found on the RN. The latter reminds me a bit of Late Blight but there are no rings or fuzziness present yet and it seems too early in the season.Both were planted 3/27; RN emerged 4/10; YG emerged a week later.

I thought both looks might just be different stages of the same problem but the damage isn't in the same place on the leaves.

All the plants are completely hilled up and lightly mulched with shredded leaves as of last week. I could take pics of the rows if it would help but they are looking fine.

Tia for any assistance-

kath