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Sirex noctilio

Sirex woodwasp

Description

Adults fly in the second half of summer. They seek out freshly cut down or uprooted trees. The female drill their ovipositors into the outer sapwood to inject eggs. One female lay from 30 to 400 eggs. From the eggs hatch larvae eating out galleries round in cross-section. Galleries in wood are firmly clogged with sawdust. The adults emerge from wood by eating out a round exit hole, 4-6 mm in diameter. Larvae overwinter twice and pupation occurs in May. This species has one generation per 2 years. Sirex woodwasp is native to Europe, and it is generally considered to be a secondary pest. It can significantly lowers the technical applicability of wood. The damage can escape one’s notice when wood is being processed. Thus, as a result, adults can hatch from furniture, wooden beams or flooring.

Symptom

Galleries in wood are firmly clogged with sawdust. 

Tree Species: Pine, Fir, Spruce

Part of a plant- attacked: Tree trunk

Pest significance: Harmful

Pest Category: Insects

Present in EU: Yes

Last observations

There are a total of 7 observations of the species in the system

Sirex noctilio Sirex woodwasp
Nikolas Janočo
Number of votes: 0
Published: 6.6.2025

Sirex noctilio Sirex woodwasp
Marián Slamka
Number of votes: 0
Published: 1.6.2025

Sirex noctilio Sirex woodwasp
Andrej
Number of votes: 0
Published: 28.5.2025

Sirex noctilio Sirex woodwasp
Ladislav Andits
Number of votes: 0
Published: 8.5.2023

Sirex noctilio Sirex woodwasp
Dana
Number of votes: 0
Published: 31.5.2021