1a frass in zwarte korreltjes: Amauromyza flavifrons
1b frass poederfijn, in groene wolken
in uithoeken van de mijn, vaak alleen te zien na openen van de mijn: Scaptomyza graminum
*Veel moderne flora's trekken Cucubalus bij Silene.
1a frass in black granules: Amauromyza flavifrons
1b frass powdery, in green clouds
in corners of the mine, often visible only after the mine has been opened: Scaptomyza graminum
*Many modern floras unite Cucubalus with Silene.
23/05/2010