🐝 Ants, Bees & Wasps

Thistle Gall Wasp

Isocolus scabiosae

About Thistle Gall Wasp

A minute gall-inducing wasp that forms swellings on knapweed flower heads. It has been studied as a potential biocontrol agent for invasive knapweeds.

πŸ’‘

Did You Know?

A single flower head can contain dozens of tiny gall chambers, each housing one larva.

How to Identify Thistle Gall Wasp

Thistle Gall Wasp (Isocolus scabiosae) belongs to the order Hymenoptera, family Cynipidae. Adults typically measure 1.5-2.5 mm.

Thistle Gall Wasp Habitat

Thistle Gall Wasp is found in meadows habitats, particularly across Europe, Western Asia. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.

Thistle Gall Wasp Diet and Feeding

Thistle Gall Wasp induces galls on plants and feeds within them. Gall-making insects trigger abnormal plant growth that provides both food and shelter for their developing larvae.

Where Is Thistle Gall Wasp Found?

Thistle Gall Wasp can be found in Europe, Western Asia, where it inhabits meadows environments. Its distribution is influenced by climate, food availability, and habitat suitability.

Distribution Map

Where Thistle Gall Wasp can be found

Is Thistle Gall Wasp Dangerous?

Thistle Gall Wasp belongs to the order Hymenoptera, which includes many stinging insects. While not typically aggressive, it may sting if threatened or handled. Stings can cause pain and swelling, and in rare cases may trigger allergic reactions in sensitive individuals.

Thistle Gall Wasp Role in Nature

Thistle Gall Wasp is part of the food web as a primary consumer, feeding on plant material. It serves as an important food source for birds, bats, amphibians, and other insectivores, connecting plant energy to higher trophic levels.

Seasonal Activity

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Peak activity Moderate Low / dormant

Frequently Asked Questions About Thistle Gall Wasp

What does Thistle Gall Wasp look like?

The Thistle Gall Wasp typically measures 1.5-2.5 mm.

Where is Thistle Gall Wasp found?

The Thistle Gall Wasp is found in Europe, Western Asia and typically inhabits meadows environments.

What does Thistle Gall Wasp eat?

The Thistle Gall Wasp induces galls on plants and feeds within them.

Is Thistle Gall Wasp dangerous to humans?

The Thistle Gall Wasp belongs to the order Hymenoptera, which includes stinging insects. While not typically aggressive, it may sting if threatened or handled.

What is an interesting fact about Thistle Gall Wasp?

A single flower head can contain dozens of tiny gall chambers, each housing one larva.

Cite This Page

APA:
InsectDiscover. (2026). Thistle Gall Wasp (Isocolus scabiosae). Retrieved from https://insectdiscover.com/insect/thistle-gall-wasp

MLA:
"Thistle Gall Wasp." InsectDiscover, https://insectdiscover.com/insect/thistle-gall-wasp.