Bangasternus fausti
 Bangasternus fausti is a species of true weevil known as the broad-nosed seed head weevil. It is used as an agent of biological pest control against noxious knapweeds particularly spotted knapweed (Centaurea maculosa) squarrose knapweed (Centaurea virgata ssp. squarrosa) and diffuse knapweed (Centaurea diffusa).The adult weevil is dark gray and hairy and about 4 millimeters long. The female lays eggs on the flower heads at an early stage of development and stem tips.