Blight is killing our tomato plants as the leaves keep turning yellow/brown and drying up.
Tomato Blight on Leaves
Certified GKH Gardening Expert
Unfortunately, there is no cure for blight. You need to remove the plants and avoid planting any nightshade crops (tomatoes, peppers and potatoes) in that spot for the next year. The blight will live in the soil for that long and will affect any nightshade plants planted there for the next year.