Onion fly
Insect — Diptera
Identification key : 
Maggot (fly larva) (Larva) 
Flies (brachyceran Diptera) (Adult (and nymphs resembling the adult))
Scientific name : Delia antiqua
Other names : Onion maggot
Greyish fly 6 to 7 mm long, resembling a small house fly, whose larvae feed on onion, shallot, leek and garlic. The white maggots bore into the base of seedlings and into bulbs, which soften and rot while the leaves yellow and wilt. It has several generations a year, the spring generation being the most damaging to young sowings.
Crops affected : Garlic, Leek, Onion
Source : Onion Fly: Prevention and Control | RHS Advice — Royal Horticultural Society (RHS)
This page lists the bio-preparations in the collection that other references associate with this opportunist: Onion fly.
Warning: the associations between recipes and opportunists come from other references (traditional practices, publications, user feedback). They are neither a recommendation nor a claim of effectiveness. There is no certainty regarding the preparation, application and use of these bio-preparations. See the regulations
No published recipe is associated with this opportunist yet.
Thrips Leek moth Onion downy mildew Leek and garlic rust Tomato spotted wilt virus Brown spot of pear (Stemphylium) Rust Downy mildew Cotton bollworm (Helicoverpa) Chilli thrips Stolbur (bois noir)