Ash Bark Weevil vs Thistle Gall Wasp
Side-by-side species comparison
| Attribute | Ash Bark Weevil | Thistle Gall Wasp |
|---|---|---|
| Scientific Name | Magdalis armigera | Isocolus scabiosae |
| Order | Coleoptera | Hymenoptera |
| Family | Curculionidae | Cynipidae |
| Size | 3-5 mm | 1.5-2.5 mm |
| Habitat | Hedgerows | Meadows |
| Diet | Gall Makers | Gall Makers |
| Regions | Europe | Europe, Western Asia |
| Conservation | Least Concern | Least Concern |
Ash Bark Weevil
A small black weevil that breeds under the bark of ash trees. Larvae create winding galleries in the cambium. Has become more noticed with ash dieback disease.
Did You Know?
Often colonizes ash trees already weakened by ash dieback disease, accelerating their decline.
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.
Did You Know?
A single flower head can contain dozens of tiny gall chambers, each housing one larva.