Yes, we got late blight from some grocery store tomato plants last year.
It spread to the
potatoes but I didn't notice how the
potato leaves looked because I didn't check for a week or so due to cool rainy weather. When I finally did all the
potato vines were down and brown. I pulled the
potatoes and as they were curing I started to smell that blight smell. yuk Then the purple started to show up. I ended up with about 1/4 storable, 1/4 had to have bad spots cut out and boiled right away , and the rest on the compost heap. Not cool.
I think that part of the problem was that I rinsed off the
potatoes. Now I read that they should not be allowed to get wet. In fact they should not be harvested while the ground is wet either. Had the potaoes remained dry and dirty I may not have lost so many.
The more I look at other sites' late blight photos the less I think that is what I have in the photo above. This years
potatoes are about 50 yards from last years. I guess time will tell but I'm going to continue copper like you did with your tomatoes.
This weekend with huricane Earl should be interesting. cool and wet , oh boy.