Centaurea jacea (Brown Knapweed or Brownray Knapweed) is a species of herbaceous perennial plants in the genus Centaurea native to dry meadows and open woodland throughout Europe. It grows to 10–80 cm tall, and flowers mainly from June to September.
Centaurea jacea (brown knapweed or brownray knapweed) is a species of herbaceous perennial plants in the genus Centaurea native to dry meadows and open woodland throughout Europe. It grows to 10–80 cm tall, and flowers mainly from June to September.
Foodplant / saprobe
pseudothecium of Nodulosphaeria jaceae is saprobic on dead stem of Centaurea jacea x nigra (C. x moncktonii)
Foodplant / internal feeder
larva of Acanthiophilus helianthi feeds within capitulum of Centaurea jacea
Foodplant / internal feeder
larva of Acinia corniculata feeds within capitulum? of Centaurea jacea
Foodplant / internal feeder
larva of Chaetorellia jaceae feeds within capitulum of Centaurea jacea
Foodplant / internal feeder
larva of Chaetostomella cylindrica feeds within capitulum of Centaurea jacea
Foodplant / parasite
Golovinomyces cichoracearum parasitises live Centaurea jacea
Foodplant / internal feeder
larva of Melanagromyza dettmeri feeds within stem of Centaurea jacea
Foodplant / saprobe
pseudothecium of Nodulosphaeria jaceae is saprobic on dead stem of Centaurea jacea
Foodplant / spot causer
usually hypophyllous colony of Ramularia hyphomycetous anamorph of Ramularia triboutiana causes spots on live leaf of Centaurea jacea
Foodplant / gall
larva of Urophora jaceana causes gall of capitulum of Centaurea jacea
Foodplant / gall
larva of Urophora quadrifasciata causes gall of capitulum of Centaurea jacea