Ips typographus

Definition

A species of bark beetle in the weevil family Curculionidae (subfamily Scolytinae), native to Europe and Asia, and a major pest of Norway spruce (Picea abies) and other conifers. Adults excavate branching egg galleries beneath the bark of stressed or weakened trees, introducing blue-stain fungi (Ceratocystis spp. and others) that disrupt water transport and degrade timber quality; heavy infestations can girdle and kill trees. Outbreaks are often triggered by drought, windthrow, or storm damage that creates abundant breeding material.

Etymology

Latin: Ips (from Greek ips, a woodworm) + typographus (printer, from the characteristic gallery patterns resembling printed characters)

Example

In the Bavarian Forest National Park, windstorms in 2018 generated massive quantities of storm-felled spruce, triggering an unprecedented outbreak of Ips typographus that killed over 100,000 hectares of forest within three years.

Synonyms

• European spruce bark beetle
• eight-toothed spruce bark beetle

Related Terms

• Scolytinae
• bark beetle
• Ceratocystis
• Picea abies
• forest entomology
• Integrated Pest Management
• phenomone trap

Usage Notes

Common name "eight-toothed spruce bark beetle" refers to the eight denticles on the declivity of the elytra, a key diagnostic character. Not to be confused with Ips sexdentatus (six-toothed bark beetle), which prefers pine. Population dynamics are strongly density-dependent and linked to host tree vigor; management relies on sanitation harvesting and trap-tree strategies rather than insecticides.