I planted potatoes in raised beds a little over a month ago, with a mixture of straw, compost, and garden soil. In the last two weeks, I started to notice little bumps and pale dots on the surface of the leaves. The problem rapidly exacerbated and spread to all of the potato leaves in the bed. I have not seen any signs of pests other than the occasional (three) aphids. After researching, I pinpointed the causes: edema, pests, or blight. Can someone help me verify what is doing this?