We have had over 26 in. of rain here in the past month, and a couple of days ago i noticed these spots on my potato leaves:
It looks like pictures i've seen of blight, but i read that blight will start on the lower leaves, this is on the upper leaves too. Our plants are fairly mature and have already bloomed. I pulled up a few potatoes and they looked ok, and they were about golf ball size. At first we tried to pick off the affected leaves, but it's still spreading, and i have over 80 tomato plants in the ground. I did a forum search but i'm pretty much a newbie and i am still unsure. How can i protect the tomatoes? What is this and what should i do?