Leek moth
Pest Small caterpillars that mine the leaves and stems of leeks, onions and garlic.
What to look for
White, translucent blotches or tunnels in leaves, and caterpillars burrowing into the centre of the plant. Small silky cocoons appear on leaves.
When: May to September.
How to prevent it
- Cover plants with fine mesh from May to September.
- Clear plant debris in autumn.
How to deal with it
- Squash caterpillars and cocoons by hand.
- Cut off damaged leaves and use the remaining plant.
Crops it affects
If you choose to use any treatment, use only products approved for UK home gardens, follow the label and avoid spraying open flowers. See all pests and diseases.