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Andricus testaceipes

Gall wasp Andricus testaceipes

Description

The unisexual generation, which takes two years to develop - forms gregarious conical galls on shoots close to the soil surface. Conical galls are light red coloured, later black. The bisexual generation causes long thickenings on the leaf petiole, on the midrib or occasionally on younger shoots, often causing bending of the affected part.

Symptom

Conical galls are light red coloured, later black. The bisexual generation causes long thickenings on the leaf petiole, on the midrib or occasionally on younger shoots, often causing bending of the affected part.

Tree Species: Oak

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Present in EU: Yes