Russian Knapweed Gall Wasp (Aulacidea acroptilonica)
Introduced from Uzbekistan and released in the USA in 2009. This wasp is well adapted to a variety of environmental conditions in its native range.
Russian Knapweed Gall Midge (Jaapiella ivannikovi)
Introduced from Uzbekistan in the USA in 2009. This midge is well adapted to a variety of environmental conditions in its native range.