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Tetropium castaneum

Black spruce beetle

Description

From April to July, the black spruce beetles deposit their eggs under the bark scales of weakened or newly dead trees, or occasionally on their roots. The hatched
larvae penetrate the bark and feed in the phloem between the bark and the wood, producing irregularly curled galleries. In fall the larvae excavate a characteristic, hook-shaped tunnel in the wood where they pupate in spring. Pupation may also occur in thick bark. Since the preferred hosts are dead, old, or greatly weakened trees, the potential damage is minor. The pupal chambers may reduce the quality of infested wood. It can be found in mountain, coniferous forests in Central and North Europe.

Symptom

Irregularly curled galleries under the bark.

Tree Species: Fir, Spruce

Part of a plant- attacked: Tree trunk

Pest significance: Harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes

Last observations

There are a total of 3 observations of the species in the system

Tetropium castaneumBlack spruce beetle
Tomáš Klinovský
Number of votes: 0
Published: 22.5.2023

Tetropium castaneumBlack spruce beetle
Filip Betko
Number of votes: 0
Published: 15.6.2022

Tetropium castaneumBlack spruce beetle
Tomáš
Number of votes: 0
Published: 16.5.2022