Allium leaf miner

Allium leaf mining fly was first detected in Britain in 2002, it has become a widespread in England and parts of Wales. The larvae bore into the stems and bulbs of leeks, onions, chives and garlic. Affected plants often develop secondary infections and rot.

Save to My scrapbook
Allium leaf miner (Phytomyza gymnostoma) on leek (Allium porrum)

Quick facts

Common name Allium leaf miner
Latin name Phytomyza gymnostoma
Plants affected Leeks, onion, chives, shallot and garlic
Main symptoms Lines of white mines on leaves, maggots or brown pupae in the stems and bulbs
Caused by Maggots of a leaf mining fly
Timing March-June and September-November

See also...


Join the RHS today and get 12 months for the price of 9

Join now

Gardeners' calendar

Find out what to do this month with our gardeners' calendar

Advice from the RHS

You may also like

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.