Potato leaves in trouble

Hi good people. My potato bed is new this year. Couple months ago, planted seed potatoes and dill. Everything’s coming up great but the leaves pop up and quickly acquire this yellow spackling. At first I thought they needed nitrogen and started to hill them with pine shavings. But it made no difference. Is it a total loss? Any ideas what to do? Bonus question: I’m looking for an app that identifies pests by what the leaves look like. I’ve seen some that identify by picture of bug, but I don’t see any bugs, just these blister like things on all the leaves.