The ram’s horn gall wasp belongs to the gall wasps. The ram’s horn gall wasp is native to southeastern Europe.
Ram’s horn gall wasp (Andricus aries) belongs to the gall wasps. The ram’s horn gall wasp is native to southeastern Europe. Meanwhile, the species also occurs in temperate regions of Europe; the first ram’s horn gall wasp was spotted in the Netherlands in 2003.
Galls of the ram’s horn gall wasp are rare; when found, they are mainly on young oaks or very old ones in dry sheltered places. In late summer, early September, the + 2.2 mm gall wasps hatch. Then the gall turns from light green to brown, leaving a relatively large exit hole.
Where to find
- Pedunculate oak (Quercus robur)
- Sessile oa
k (Quercus petraea) - Downy oa
k (Quercus pubescens)
Control
Does not apply.
Prevention
Does not apply.
