tomato fungus

tomato fungus it take all of the plants and we use several fungicide like chlorothalonil but it didn't work.

  • Tomatoes are such fragile plants when it comes to diseases and fungi. You can spend hours combing the web to figure out which thing afflicts your plant. I think Septoria Leaf Spot is much more common than believed.
    – Evil Elf
    Apr 11 '20 at 12:36

It looks like early blight, which is a fungus. I usually control by being careful not to wet the plants when watering (only water the mulch around them), and growing them in a polytunnel which keeps them dry and relatively free of spores.

Infected plants can sometimes be saved by removing the affected parts, being careful not to spread spores to unaffected parts.

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