Plant Parasites of Europe

leafminers, galls and fungi

Erigeron canadensis

canadian fleabane

synonym: Conyza, Tripmorpha, canadensis

organparasitic modestagenotetaxonomic groupparasite
leafvagrantRhopalidaeStictopleurus punctatonervosus
leafvagrantdoubtfulMiridaeOncotylus viridiflavus
leafvagrantLygaeidaeNysius senecionis
leafvagrantMiridaeLygus gemellatus
leafvagrantAlydidaeAlydus calcaratus
leafvagrantPentatomidaeHalyomorpha halys
leafvagrantBerytidaeNeides tipularius
leafvagrantMiridaeLygus maritimus
leafvagrantAlydidaeCamptopus lateralis
leafvagrantAphididaeMacrosiphum euphorbiae
flowervagrantGeometridaeEupithecia centaureata
leafvagrantPterophoridaeStangeia siceliota
leafvagrantCicadellidaeAphrodes bicinctus
rootvagrantChrysomelidaeLongitarsus dorsalis
leafvagrantChrysomelidaeCassida nobilis
root collarscaleEriococcidaeRhizococcus munroi
leafvagrantTortricidaeCacoecimorpha pronubana
flowerborerspring generationTortricidaeCochylidia heydeniana
stemborersummer generationTortricidaeCochylidia heydeniana
leafleaf spotCercosporella virgaureae
leafvagrantsummer generationAphididaeAphis fabae fabae
leafvagrantsummer generationAphididaeAphis fabae
systemicborerAnguinidaeDitylenchus dipsaci
leafdownErysiphalesGolovinomyces cichoracearum
leafdownErysiphalesPodosphaera erigerontis-canadensis
leafdownPeronosporalesBasidiophora entospora
leafleaf spotEntylomatalesEntyloma erigerontis
leafminerAgromyzidaeCalycomyza humeralis
leafminerAgromyzidaeChromatomyia syngenesiae
leafminerAgromyzidaeLiriomyza strigata
leafminerAgromyzidaePhytomyza conyzae
leafminerAgromyzidaePhytomyza erigerophila
leafpustuleChytridialesSynchytrium aureum
leafvagrantsummer generationAphididaeBrachycaudus helichrysi
leafvagrantsummer generationAphididaeAphis frangulae
leafvagrantsummer generationAphididaeAphis nasturtii
stemvagrantAphididaeAphis craccivora
flowervagrantAphididaeUroleucon simile
stemvagrantAphididaeUroleucon erigeronense
leafvagrantAphididaeAphis spiraecola
leafvagrantAphididaeAphis gossypii
leafvagrantAphididaeMyzus ornatus


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 7.iv.2022