Plant tribe | Plant genus | Plant species | Part of plant | Region | Literature | Source |
Carduoideae | Centaurea | diffusa | Flowerhead (gall) | USA | Merz (1994) | BCA (biological control agent) |
stoebe | Flowerhead (gall) | Switzerland | Merz (1994) | Breeding - Switzerland | ||
Flowerhead (gall) | USA | Merz (1994) | BCA (biological control agent) |