Tomato leafminer
Dangerous tomato pest from South America. Caterpillars feed in leaves, stems and fruits. In heated greenhouses in Poland 4-6 generations per year, in unheated tunnels 2-4.
Symptom photos
Symptoms
- Irregular mines in leaves
- Tunnels in main stems
- Entry holes in fruits
- Frass in tunnels and on fruits
What it does to the crop
- Mines and feeding damage in leaves
- Tunnels in stems
- Burrowing into fruits
- Complete yield loss with severe infestation
What encourages it
- Greenhouses and tunnels
- Warm weather
- Import of plant material
Prevention
- Pheromone traps
- Insect screens
- Control of imported material
- Destruction of infected plant parts
⚠️ Before you reach for a spray
This atlas is informational and still growing — different diseases can look almost identical. Confirm the diagnosis and read the product label before applying any plant protection product. If you are unsure, ask your local extension or advisory service.
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