yes, you can get it on mators and tators.......

we have never had it on our potatoes beeboy, just a fight with the colorado beetles, but for the most part have those buggers beat.....
as far as the tators, just my understanding, the blight is caused by a spore in the ground. when it rains, and your dirt plops up on your the leaves on the plant will cause the browning and spotting. you can cut the lower leaves off, but by then it's already in the 'vascular' or 'vein' system of the plant, not sure of the correct terminology.......just winging it here......

what we do is mound our tators, and cover in straw, it prevents this? my understanding is a fungicide sprayed on will not help the plant.....
mators, to prevent blight, we also use some sort of mulch in the wells.
sorry, i am not the master gardener in the household, but passing along some of the info my brain was filled with upon asking........

here's some info from the Vegetable Gardener's Bible:
"EARLY AND LATE BLIGHT:
Plants affected: A variety of plants
Description:
Although these diseases affect similar plants, they're caused by very different fungi. Early blight most often appears before the first fruits have ripened. It produces brown, circular spots on leaves, each spot marked with concentric rings. Plants are most often infected during periods of warm, humid weather.
Late blight, which can attack seedlings or mature plants, sounds like a tardy sibling of early blight, but it isn't. It's called late blight because it most often appears during spells of warm, wet weather------conditions that most often occur late in the growing season. Late blight is the disease that caused the great potato famine in Ireland in 1845. The scientific name of the fungus that causes the disease translates as "plant destroyer". The disease first appears as dark spots on the leaves, which often have a strong, offensive odor. Eventually the plants rot and collapse.
Control: To control early blight, spray plants with neem oil or compost tea. Avoid damaging plants when cultivating. remove weeds regularly, plant resistant varieties, and use row covers to exclude flea beetles that can spread the disease. To prevent the disease, rotate crops annually and plant certified seed."hope this helps? i am not the master gardener, just the beekeeper......
