Plagionotus arcuatus

Long-horned beetle Plagionotus arcuatus

Description

This yellowish black wasp-like beetle belongs to the commonest longhorn species in Central Europe. It attacks only severely damaged or dead standing trees, or fallen trunks. About 20-22 mm pale yellow larva excavates galleries under the bark, at first in phloem and later on also in the wood. The galleries are pressed by fine wood debris. Towards the end of summer, it bores 3-5 cm into the wood, where it pupates. Adult emerges from the tree trunk through about 3 x 6 mm oval exit holes. The generation is annual.

Symptom

Galleries under the bark, at first in phloem and later on also in the wood. The galleries are pressed by fine wood debris. Adult emerges from the tree trunk through about 3 x 6 mm oval exit holes.

Tree Species: Oak, Hornbeam, Maple, Lime

Part of a plant- attacked: Tree trunk

Pest significance: Very harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes

Seasonal frequency of occurrence