Lasius fuliginosus

Jet ant

Description

Lasius fuliginosus, commonly known as the jet ant or shining black ant, is a forest-dwelling species found throughout much of Europe. It nests in tree cavities, often those already affected by other organisms, particularly older trees like oaks, hornbeams, and beeches. Lasius fuliginosus can nest in coniferous trees, although it prefers deciduous species. This ant has been observed nesting in cavities of older pines (Pinus spp.), particularly in areas where these trees are predominant. It is a dendrobiont species that inhabits cavities under the trunks and roots of living trees, both deciduous (prefered) and coniferous. Nests are constructed using a unique "carton" material made from chewed wood and glandular secretions. While this species can be locally abundant, it is not considered a serious pest. However, it may weaken host trees over time (lost stability) by enlarging existing hollows and by actively tending and protecting sap-feeding insects such as aphids and scale insects.

Symptom

On the trunks and within the cavities of older trees, there are hollow spaces and small chambers in the wood. Aphid colonies and honeydew accumulation may occur on nearby shoots.

Tree Species: Pine, Beech, Oak, Hornbeam

Part of a plant- attacked: Tree trunk, Roots

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes