Pests
Carrot fly
Identify Carrot fly: symptoms, possible causes, prevention, and practical actions for 8 affected plants. Root damage
Editorial diagnosis
Diagnosis overview
Carrot fly damages carrots and related umbellifers through larval feeding in the roots.
In gardens, Carrot fly can occur on plants including Common chicory, Coriander, Salsify, Daucus carota. In the available profiles, it is linked mainly with Herbs, Leafy vegetables, Root vegetables.
The recorded risk level is medium. Suspect carrot fly early when rust-brown tunnels appear in carrots, parsnips, or parsley roots.
Inspect leaf undersides, shoot tips, and the soil around the plant at different times of day. Eggs, larvae, droppings, webbing, or slime trails are often more diagnostic than one damaged leaf.
A common mistake is to treat feeding damage without checking the animal, eggs, larvae, time of activity, and affected plant parts.
At a glance
Plants
8
Category
Herbs, Leafy vegetables, Root vegetables, Stalk vegetables
Risk
medium
Scientific name
Psila rosae
Typical signs
- Rust-brown tunnels
- Distorted roots
- Weak foliage
- Often noticed at harvest
Possible confusion
- Similar feeding damage: Always check for insects, droppings, slime, mines, holes, or residues. The damage pattern alone is often not enough.
Immediate actions
- Inspect affected parts and remove where useful
- Stabilise the plant and reduce stress
- Keep monitoring the planting
Prevention
- Encourage vigorous plants
- Monitor regularly
- Support beneficials and diversity
- Adapt care to weather and site
Affected plants
Guides
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