spotted knapweed

synonym: Centaurea maculosa, maculosa subsp. rhenana, mureti, rhenena

organ parasitic mode stage note taxonomic group parasite
flower borer Cosmopterigidae Pyroderces argyrogrammos
flower borer Gelechiidae Metzneria paucipunctella
root collar borer summer generation Tortricidae Cochylimorpha straminea
flower borer spring generation Tortricidae Cochylimorpha straminea
leaf miner Anthomyiidae Pegomya centaureae
root borer larva Buprestidae Sphenoptera jugoslavica
root gall larva Curculionidae Cyphocleonus achates
root collar gall Curculionidae Cleonis pigra
flower borer larva Curculionidae Larinus obtusus
root collar borer larva Apionidae Ceratapion orientale
root vagrant Aphididae Protrama radicis
stem vagrant Aphididae Uroleucon jaceicola
root vagrant Aphididae Trama centaureae
root vagrant Aphididae Trama rara
flower borer Tephritidae Chaetorellia acrolophi
flower vagrant Aphididae Uroleucon jaceae
stem borer Agromyzidae Melanagromyza oligophaga
fruit gall Cynipidae Isocolus jaceae
fruit gall Tephritidae Urophora quadrifasciata
flower borer Tephritidae Terellia virens
flower gall Curculionidae Larinus minutus
flower gall Tephritidae Urophora affinis
leaf down Erysiphales Golovinomyces montagnei
leaf gall Cecidomyiidae Loewiola centaureae
leaf gall Eriophyidae Aceria centaureae
leaf miner Agromyzidae Liriomyza centaureae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Zygaenidae Jordanita chloros
leaf miner Zygaenidae Jordanita globulariae
leaf miner Zygaenidae Jordanita notata
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 summer generation Aphididae Aphis fabae
stem borer Agromyzidae Ophiomyia curvipalpis
stem gall Cynipidae Isocolus scabiosae
stem gall Cynipidae Phanacis centaureae
root collar borer Apionidae Ceratapion penetrans
stem vagrant Aphididae Macrosiphoniella staegeri
stem vagrant summer generation Aphididae Acaudinum longisetosum
root collar vagrant spring generation Aphididae Acaudinum longisetosum
root collar vagrant spring generation Aphididae Acaudinum roumanicum
leaf vagrant summer generation Aphididae Acaudinum roumanicum

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 19.viii.2019