Sorry to hear about the blight, if that is what it is. It is my understanding that blight is viral? Maybe even prion? It appears to spread on the wind throughout regions. We have late blight blowing around, last year I had beautiful tomato plants, 4ft tall black Krim, setting fruit, then they looked like burnt with a torch, they yielded nothing. There are blight resistant tomatoes, but I opted to plant up north, no blight there.
And no potato bugs either! A tremendous blessing, otherwise I would have to plow down my half mile of rows. Hopefully for next year Yukon Gem can give you better results.
I agree with Dan, multiple approaches is always good. I have 12 varieties growing this year. It seems there's a potato variety for every climate condition and soil type. And then there's the applications each kind can be used for, practically endless. I have seen very different results in growing seed potatoes on a colder flat compared to their field results.
Ag Canada has 200 listed / licensed varieties, I expect the US selection is similar or larger. Some of the newer ones might have promising characteristics. Goldeye is one promising strain, introduced in 2006, might suit a short growing season and be disease resistant, good yield. I have some growing, I will know more in the fall.
I found this:
There is a GMO variety, Innate, which should address the issue, not sure how you would feel about that. Various others have natural bred resistance, Orla, Elba, Sarpo Mira, Colleen. Just a cursory search result. Very thankful I don't have that difficulty.