One of the most important things in tomato culture is to make sure that no soil comes in contact with the leaves, a lot of tomato diseases are soil borne. When you plant your tomatoes make sure that you use a thick mulch to keep rainwater from splashing dirt up onto your leaves and do not overhead water your plants, irrigate or drip instead. Some blights can be brought by insects that suck on the juices of the tomato plants so try and control white fly and aphids. If you smoke, do not touch the leaves with an unwashed hand. Most of your better tomatoes, heirloom varieties, do not have much resistance to these blights and once infected there's not much you can do. Even some of the resistant hybrid varieties are still affected by these blights----they are resistant, not immune. The last resort is container planting.TnMtngirl said:My tomato plants look like the have been scalded,I have a problem with blight every year.What should I use to control this?Next year I will definitly try blight restiant tomatoes.
Sounds like early blight, the brown spots will have concentric circles if its early blight.Jicama said:I have also had trouble with all my tomatoes dying for three years now, even though I did plant in different places, so this year I only put out two in pots. I used potting soil and still they are dying. The lower leaves turn yellow with spots and then the next leaves up and so forth. Any suggestions other than never planting tomatoes??