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Rhagium sycophanta

Ribbed borer

Description

About 17–30 mm long beetle with short antennae and two distinct thorn-like outgrowths on the thorax. It is greyish-brown with paler spots on elytra. The female is larger than the male. It flies from May until August in broadleaved forests. Larvae excavate galleries under the bark of oak stumps and fallen trunks. It usually attacks injured or dead trees.

Symptom

Galleries under bark. Elliptical exit holes.

Tree Species: Oak

Part of a plant- attacked: Tree trunk

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes