brown knapweed

synonym: Centaurea jungens

organ parasitic mode stage note taxonomic group parasite
flower borer Tortricidae Cochylis posterana
root borer doubtful Tortricidae Endothenia oblongana
flower borer Tortricidae Cochylis dubitana
root borer Tortricidae Agapeta zoegana
flower gall Gelechiidae Metzneria metzneriella
flower gall Gelechiidae Metzneria metzneriella
flower borer rarely Gelechiidae Metzneria neuropterella
flower gall Curculionidae Rhinocyllus conicus
flower gall larva Curculionidae Larinus carlinae
flower borer larva Curculionidae Larinus obtusus
flower borer larva Curculionidae Larinus sturnus
unknown borer larva Apionidae Ceratapion armatum
leaf miner Agromyzidae Chromatomyia horticola
leaf down Peronosporales Bremia lactucae
stem gall Tephritidae Trypeta lemei
stem miner Agromyzidae Aulagromyza jaceicaulis
stem borer Agromyzidae Melanagromyza oligophaga
stem borer Agromyzidae Melanagromyza dettmeri
stem miner Agromyzidae Ophiomyia spenceri
leaf vagrant summer generation Aphididae Aphis fabae
fruit gall Cynipidae Isocolus jaceae
fruit gall Tephritidae Urophora quadrifasciata
flower borer Tephritidae Acinia corniculata
flower borer Tephritidae Chaetorellia jaceae
flower borer Tephritidae Chaetorellia loricata
flower borer Tephritidae Chaetostomella cylindrica
flower borer rarely Tephritidae Terellia colon
flower gall Eriophyidae Aceria grandis
flower gall main Tephritidae Acanthiophilus helianthi
flower gall Tephritidae Urophora jaceana
leaf bud gall Cecidomyiidae Dasineura centaureae
leaf down Erysiphales Golovinomyces montagnei
leaf down Peronosporales Bremia centaureae
leaf gall Cecidomyiidae Loewiola centaureae
leaf gall Eriophyidae Aceria centaureae
leaf miner Agromyzidae Aulagromyza similis
leaf miner Agromyzidae Liriomyza centaureae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Phytomyza spoliata
leaf miner Chrysomelidae Sphaeroderma rubidum
leaf miner Coleophoridae Coleophora brevipalpella
leaf miner Coleophoridae Coleophora conspicuella
leaf miner Coleophoridae Coleophora gardesanella
leaf miner Coleophoridae Coleophora paripennella
leaf miner Coleophoridae Coleophora rectilineella
leaf miner Curculionidae Pseudorchestes pratensis
leaf miner Depressariidae Agonopterix arenella
leaf miner Depressariidae Agonopterix carduella
leaf miner Depressariidae Agonopterix subpropinquella
leaf miner Gelechiidae Scrobipalpa perinii
leaf miner Zygaenidae Jordanita globulariae
leaf miner Zygaenidae Jordanita notata
leaf pustule Chytridiales Synchytrium aureum
leaf pustule Chytridiales Synchytrium taraxaci
leaf pustule aecia Pucciniales Puccinia caricis-montanae
leaf pustule aecia uredinia telia Pucciniales Puccinia centaureae
leaf pustule uredinia telia Pucciniales Puccinia jaceae
leaf pustule telia Pucciniales Puccinia verruca
leaf vagrant Eriophyidae Epitrimerus jaceae
stem borer Agromyzidae Ophiomyia curvipalpis
stem gall Cynipidae Isocolus scabiosae
stem gall Cynipidae Phanacis centaureae
root collar borer Apionidae Ceratapion penetrans
root gall main Curculionidae Pseudocleonus grammicus
root vagrant Aphididae Trama troglodytes
stem vagrant summer generation Aphididae Acaudinum longisetosum
root collar vagrant spring generation Aphididae Acaudinum longisetosum
root collar vagrant Aphididae Acaudinum centaureae
flower vagrant Aphididae Uroleucon jaceae
stem vagrant Aphididae Uroleucon jaceicola

Organ

the part of the plant that most conspicuously is hit by the parasite

all buds: both flower buds and leaf buds
flower: also inflorescence
leaf: also needle, phyllodium, petiole
leaf bud: also unfolding young leaf
fruit: also seed
root: also root stock, runners
root collar: also the lowest part of the stem
stem: also culm, the lower part of the peduncle, in grasses also leaf sheath
systemic: the entire above-ground plant.

PARASITIC MODE

borer: larva living internally, almost no outwards signs
down: 0.5-2 mm high fungal down
film: very thin cover of fungal tussue
gall: swelling and/or malformation
grazer: feeding at the outside of the plant
leaf spot discoloured, often ± necrotic, generally not galled, sign of a fungus infection
miner-borer: larve initially makes a mine, lives as a borer later
pustule: plug of fungal tissue, generally brown-black and < 2 mm
stripe: longitudinal line of fungal tissue in a grass leaf
vagrant: (aphids, mites) living freely on the plant, at higher densitiy causing malformations.

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IMPORTANT

The host plant spectre of a parasite is rarely known exhaustively; this applies in particular at the species level. It is advisable therefore to check at least also the list of all parasites of this genus.

 

mod 5.xi.2019