Monochamus sutor

Small white-marmorated longicorn

Description

Small white-marmorated longicorn Monochamus sutor is a longhorn beetle native to Eurasia's coniferous forests, from the Atlantic coast to West Siberia. This species primarily infests Norway spruce (Picea abies), in northern or mountaneous regions. I may also inhabit pines (Pinus spp.). The beetles target referebly weakened, dying, or freshly fallen trees, particularly larger or older trunks. Young larvae feed under the bark, while older larvae bore deeper into the wood, creating irregular tunnels. The larvae overwinter twice and than pupate near the wood surface. Adults, active from June to September with a peak in July, feed on the bark of thin twigs. Life cycles typically last two years but can vary.

Symptom

Infestation symptoms include circular exit holes on the wood surface and irregular tunnels filled with wood shavings under the bark and in the wood. Unlike other similar species, M. sutor tunnels deeply into the wood.

Tree Species: Pine, Spruce

Part of a plant- attacked: Tree trunk, Branch

Pest significance: Harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes