Arhopalus rusticus

Longhorn beetle Arhopalus rusticus

Description

Arhopalus rusticus is a species of longhorn beetle in the family Cerambycidae. It is commonly found in forested areas, ranging from Europe to East Asia, and is known to preferably attack pine trees. It can also develop in other coniferous trees such as Picea, Abies, and Larix; however, Pinus is preferred. The larvae of this beetle live under the bark and in shallow sapwood. It prefers dead trees and is typically a secondary pest. As its galleries can sometimes be a disadvantage in wood processing, it is considered a wood-destroying insect. The adult beetles are typically active during the summer months; they can be found resting on host trees and are attracted to light at night. They have a robust, elongated body with a reddish-brown to dark brown coloration. The species is of particular concern in forestry and wood production industries due to its potential to harm wood products. It is very similar to Arhopalus ferus, which is usually much rarer.

Symptom

The larvae create extensive galleries in the shallow sapwood, which are typically filled with frass (sawdust-like material). Sawdust-like frass can accumulate around the base of the tree or in the immediate area, indicating larval activity.

Tree Species: Pine, Spruce, Larch

Part of a plant- attacked: Tree trunk

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes