Onion fly

The maggots of onion fly can damage the roots and bulbs of onions and some related plants, sometimes killing seedlings.

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Onion fly (Delia antiqua) on onion

Quick facts

Common name: Onion fly
Latin name: Delia antiqua
Plants affected: Onion, shallots and leeks
Main symptoms: Yellowing and wilting of leaves, damaged bulbs and seedlings killed
Caused by: Larvae of a fly
Timing: June and July

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