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Semanotus russicus

Long-horned beetle Semanotus russicus

Description

Semanotus russicus is a xylophagous beetle associated primarily with trees of the family Cupressaceae, especially Juniperus and Thuja. In Central Europe, it naturally develops in steppe juniper stands but has recently adapted to urban environments, where it colonizes decorative conifers in gardens and parks. The larvae develop under the bark of weakened or freshly dead trees and also in roots, creating relatively wide frass-filled galleries in the bark and sapwood. Pupation occurs in autumn in the wood, and adults emerge in early spring. The species is distributed in southeastern and central Europe, the Near East, and parts of Asia. Although locally abundant, its overall harmfulness is low and limited to ornamental trees in dry, stressed habitats.

Symptom

Wide galleries with frass under the bark; exit holes in trunks and roots; dry or dying branches on conifers.

Tree Species: Juniper, Cypress, Thuja

Part of a plant- attacked: Tree trunk, Roots

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes