ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY
Onion fly larva. Macrophotograph of an onion fly larva (Delia antiqua) eating the leaf of a leek plant (Allium ampeloprasum). The female onion fly will lay between 150 to 200 eggs. She will either lay her eggs singly or in clusters of 15-20. The eggs will be laid in the vicinity of the host plant, which is usually an onion, leek or shallot plant. When the eggs hatch, the larva will feed on the host until it is fully developed. It will then bury itself in soil where it will pupate into an adult onion fly. The onion fly is a common garden pest in central Europe.
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