Brassicogethes aeneus

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Brassicogethes aeneus (click on image to enlarge it)
Author(s): Udo Schmidt
Source: Wikimedia Commons

Brassicogethes aeneus (Fabricius, 1775) - (rapeseed pollen beetle)

This pollen beetle is a common pest in Europe, damaging flowers and developing pods of oilseed rape which can result in significant yield losses. The Adults only feed on pollen and lay their eggs into unopened floral buds of rape plants where the larvae feed and develop. Pupation occurs in the ground.

The life cycle from egg to mature adult lasts about 2 months. There are usually 2 generations per year with the adults of the 2nd generation overwintering until spring. Control through pesticides is the standard approach, but pesticide resistance has become a major problem.

The adults are 2-3 mm long. The colour is a shiny metallic black, often with a green or blue tinge. Legs and antennae are dark brown. The shape is oval, the elytra have tiny hairs and do not cover the complete abdomen, leaving the pygidium exposed.

Vernacular names
• Deutsch: Rapsglanzkäfer
• English: rapeseed pollen beetle
• Español: meligete de la colza
• Français: méligèthe du colza

Synonyms:
Meligethes aeneus