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Hylastes cunicularius

Bark beetle Hylastes cunicularius

Description

The adult is 3.5–4.4 mm long. Females oviposit on spruce stumps or older felled trees during May. The egg gallery system is plain, prolonged with a bend at the end, up to 10 cm long and 1.7–2 mm wide. The larval galleries are relatively sparse. Larval feeding causes no damage an, is actually beneficial for stump decomposition. On the other hand, the adult feeding of young beetles has devastating effects on roots and butts of young spruce trees. The feeding galleries are canal-shaped, with sharp edges. The root damage may also be intensive.

Symptom

 The egg gallery system is plain, prolonged with a bend at the end, up to 10 cm long and 1.7–2 mm wide. The larval galleries are relatively sparse.

Tree Species: Spruce

Part of a plant- attacked: Tree trunk

Pest significance: Very harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes