Hylesinus crenatus
Larch elm bark beetle
This is the largest member of the Hylesinus genus in Europe. It excavates tunnels under the bark. Its gallery system has two branches perpendicular to the trunk axis. They are only 4–6 cm long and and 3 mm wide. The larvae mine long tunnels. The larch elm bark beetle lives under the bark of thicker ash trunks, where it is less common than Hylesinus varius = fraxini. The adult insect is 4–6 mm long.
Tunnels under the bark. Its gallery system has two branches perpendicular to the trunk axis. They are only 4–6 cm long and and 3 mm wide.
Tree Species: Ash
Part of a plant- attacked: Tree trunk
Pest significance: Harmful
Pest Category: Insects
Invasive Species: No
Present in EU: Yes
Pest group: Insect
Depth of damages: Bark, Under bark only, Up to 0,5 cm depth
The extent of damage: Lokally
Prevalence in Europe: Common
Damaged products: Firewood, Fresh timber logs (water still in the sapwood)
Roundwood size: Branches and twigs, Diameter up to 10 cm
Wood discoloration: Yes
Exit holes: Round
Pest subcategory: Bark and underbark insect
Similar pests
Tomicus piniperda
Hylastes ater
