Pest on crop
Onion Maggot on leek
Delia antiqua
Fly whose larvae tunnel into onion bulbs and roots, causing rot and stunted plants. Three generations per year in most US zones.
- Pest
- Onion Maggot
- Scientific name
- Delia antiqua
- Crop
- Leek
- Total hosts
- 4
Onion Maggot on leek
Detailed guidance for this section is being prepared. Check back soon.
Signs on leek
- ▸ Wilting of young onion plants
- ▸ Tunneled bulbs with secondary rot
- ▸ Maggots visible in damaged tissue when bulb is split
- ▸ Yellow leaves on affected plants
IPM controls
- ✓ Floating row cover from planting through bulb formation
- ✓ Crop rotation away from previous onion beds
- ✓ Avoid heavy organic amendments in onion beds (attract egg-laying flies)
- ✓ Beneficial nematodes (Steinernema) applied to soil at planting
Other crops affected by onion maggot
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