It's definitely a blight of some kind that has struck down almost half my potato plants. I suppose it could be a herbicide drifting with the wind but not likely since it has spread from plant to plant. It's frustrating because they were growing so well and what I'll be using as a very few earlies would have made a lovely harvest this fall.
It makes it tempting to put up a large polytunnel to protect everything!
Speaking of polytunnels, the tomatoes inside mine are doing very well and one has started fruiting already. I use the old-fashioned method of pollinating (putting my hands in and giving it a brisk shake) every other day. Fortunately, I like the smell of the plants.
Everything else has weathered yesterday's fierce thunderstorm well (including the weeds!).