Thanks for the info :o}
Three years ago we lost all of our tomato plants to blight - everyone here in upstate NY did. The blight presented as yellowed leaves with round black spots. Even though we picked all the tomatoes (just beginning to turn red) we could not get them to ripen using any of the usual methods - they all ended up rotting. That’s what the blight does.
We pulled the plants by the roots and discarded them far from the garden. We did that as soon as we knew it was blight to cut down on the impact it would have on the soil.
The soil will hold the “spores” for up to three years, so it’s suggested that no tomatoes be planted where the blighted plants were for - you guessed it - three years. My husband re-planted the one space after only 24 months, but so far I haven’t seen blight.
I had also read that potato are in the tomato family, so they shouldn’t be planted in those areas where blight was for the same three year period. I don’t know how true that is though.