Plant Parasites of Europe

leafminers, galls and fungi

Erigeron acris

blue fleabane

synonym: Erigeron acer, orientalis; Trimorpha acris

organparasitic modestagenotetaxonomic groupparasite
leafpustuleaeciaPuccinialesPuccinia caricis-erigerontis
leafvagrantCicadellidaeHephathus achilleae
leafvagrantPterophoridaeOidaematophorus rogenhoferi
leafhiddenTortricidaeArgyrotaenia ljungiana
leafhiddenTortricidaeCnephasia pasiuana
flowerborerspring generationTortricidaeCochylidia heydeniana
stemborersummer generationTortricidaeCochylidia heydeniana
leafleaf spotCercosporella virgaureae
fruitvagrantColeophoridaeColeophora squamosella
root collarvagrantAphididaeAphis erigerontis
flowergallCecidomyiidaeContarinia erigeronis
flowergallCecidomyiidaeDasineura socialis
flowergallEriophyidaeAceria puculosa
leafdownErysiphalesGolovinomyces cichoracearum
leafdownErysiphalesPodosphaera erigerontis-canadensis
leafdownPeronosporalesBasidiophora entospora
leafleaf spotEntylomatalesEntyloma erigerontis
leafgallAphididaeAcuticauda erigerontis
leafgallCecidomyiidaeDasineura erigerontis
leafminerAgromyzidaeCalycomyza humeralis
leafminerAgromyzidaeCalycomyza solidaginis
leafminerAgromyzidaePhytomyza erigerophila
leafminerdoubtfulBucculatricidaeBucculatrix latviaella
leafminerGelechiidaeGnorimoschema nordlandicolella
leafminerGelechiidaeGnorimoschema valesiella
leafminerGelechiidaeScrobipalpula diffluella
leafminerGelechiidaeScrobipalpula psilella
leafpustuleteliaPuccinialesPuccinia dovrensis
root collargallCecidomyiidaeRhopalomyia ruebsaameni
flowervagrantAphididaeUroleucon simile
leafvagrantsummer generationAphididaeBrachycaudus helichrysi


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.


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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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.


Last modified 3.xii.2021