Athalia rosae

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Athalia rosae (click on image to enlarge it)
Author(s): Michael Becker
Source: Wikimedia Commons
Athalia rosae larva (click on image to enlarge it)
Author(s): Donald Hobern
Source: Wikimedia Commons

Athalia rosae (Linnaeus) - (coleseed sawfly)

This sawfly breeds mainly on Brassicaceae like Brassica or radish. The main distribution areas are in temperate parts of Europe and Asia. In Europe, there are typically 2-3 generations per year and the final instar larvae of the last generation can cause significant damage. Outbreaks can develop with crops being defoliated. Females use their ovipositor to lay eggs inside the leaf margins. The larvae feed on the leaves, flowers and fruits and may leave only the midribs of the leaves.

The larvae are initially greyish green and later become dark gray with light stripes on the sides. Adults are 6-8 mm long and predominantly orange in colour with antennae and parts of the thorax black.

The turnip sawfly (Athalia rosae ruficornis) is found in Asia.

Vernacular names
• Deutsch: Kohlrübenblattwespe
• English: coleseed sawfly
turnip sawfly
• Español: oruga de los nabos
• Français: tenthrède de la rave

Synonyms:
Athalia colibri