Cyphocleonus achates (Fåhraeus, 1842)

spotted knapweed root weevil

on Centaurea


Weevil larvae or pupae in a fusiform, 3 cm long, root gall.

host plants

Asteraceae, monofaag

Centaurea arenaria, diffusa, friderici, stoebe & subsp. australis, vallesiaca.

A record from Achillea millefolum is unlikely.

distribution within Europe

(PESI, 2019).


Employed in the biological control of spotted knapweed, Centaurea stoebe, in North America.


Dieckmann (1983a), Stinson, Schroeder & Marquardt (1994a).

mod 8.v.2019