Fungal disease
Tomato Target Spot
A fungal disease that causes ringed brown spots on tomato leaves and fruit in warm, humid weather.
Symptoms
- Brown spots with rings and a yellow halo
- Spots on leaves at any height, and on the fruit
- Leaves dying and dropping when spots merge
What causes it
The fungus survives on plant debris and spreads in warm, humid conditions with long leaf wetness.
What you can do
- Give the plant space and good air flow; avoid crowding it against other plants.
- Remove lower leaves and any affected leaves.
- Water the soil, not the leaves, and water in the morning so any splashes dry quickly.
- Do not grow the same crop in the same spot next year; rotate beds for two to three years.
Not sure it's target spot?
Photograph one affected leaf and Plantulus will suggest the most likely problem, with a confidence score. It's free and needs no sign-up.
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General guidance only, not a diagnosis. Check product labels and local rules before using any treatment, and ask a horticultural specialist if a valuable plant is struggling. See the disclaimer.