perennial cornflower

synonym: Centaurea angustifolia Mill., montana

organ parasitic mode stage note taxonomic group parasite
unknown unknown Tortricidae Aethes decimana
flower borer larva Curculionidae Larinus rugulosus
flower borer larva Curculionidae Larinus obtusus
leaf miner Agromyzidae Chromatomyia horticola
leaf down Peronosporales Bremia centaureae
fruit gall Cynipidae Isocolus jaceae
flower borer Tephritidae Chaetostomella cylindrica
flower borer Tephritidae Trupanea stellata
leaf bud gall Cecidomyiidae Dasineura centaureae
leaf down Erysiphales Golovinomyces depressus
leaf down Erysiphales Golovinomyces montagnei
leaf down Erysiphales Podosphaera xanthii
leaf down Peronosporales Bremia lactucae
leaf gall Aphididae Uroleucon montanivorum
leaf gall doubtful Cecidomyiidae Loewiola centaureae
leaf miner Agromyzidae Liriomyza centaureae
leaf miner Agromyzidae Phytomyza autumnalis
leaf miner Agromyzidae Phytomyza montana
leaf miner Anthomyiidae Pegomya centaureae
leaf miner Coleophoridae Coleophora conspicuella
leaf pustule Albuginales Pustula spinulosa
leaf pustule aecia Pucciniales Puccinia caricis-montanae
leaf pustule aecia uredinia telia Pucciniales Puccinia centaureae
leaf pustule uredinia telia Pucciniales Puccinia montana
leaf pustule telia Pucciniales Puccinia verruca

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.x.2019