Plant Parasites of Europe

leafminers, galls and fungi

Petasites hybridus


synonym: Petasites officinalis

organparasitic modestagenotetaxonomic groupparasite
rootborerCurculionidaeLiparus glabrirostris
rootborerCurculionidaeLiparus germanus
stemborerNoctuidaeGortyna flavago
leafvagrantErebidaePhragmatobia fuliginosa
leafvagrantCicadellidaeEupteryx petasitidis
leafvagrantCicadellidaeEupteryx atropunctata
rootvagrantChrysomelidaeLongitarsus suturellus
rootvagrantChrysomelidaeLongitarsus zangherii
leafpustuleaeciaPuccinialesAecidium petasitidis
leafvagrantTenthredinidaeAglaostigma lichtwardti
leafvagrantTenthredinidaeAglaostigma discolor
leafvagrantTenthredinidaeTenthredo trabeata
leafvagrantTenthredinidaeTenthredo mandibularis
stemboreryounger larvaDepressariidaeAgonopterix petasitis
leafhiddenolder larvaDepressariidaeAgonopterix petasitis
rootborerTortricidaeEpiblema grandaevana
leafhiddenTortricidaeClepsis spectrana
leafhiddenTortricidaePandemis dumetana
root collarborerTortricidaeEpiblema turbidana
leafminersummer generationPterophoridaePlatyptilia gonodactyla
stemborerspring generationPterophoridaePlatyptilia gonodactyla
stemborerPterophoridaeBuszkoiana capnodactylus
flowerborerSyrphidaeCheilosia canicularis
stemborerSyrphidaeCheilosia orthotricha
leafborerSyrphidaeCheilosia himantopus
leafvagrantAphididaeAphis torquens
flowerborerNoctuidaeHydraecia petasitis
leafborerNoctuidaeHydraecia petasitis
rootborerNoctuidaeHydraecia petasitis
leafdownErysiphalesGolovinomyces cichoracearum
leafminerAgromyzidaePhytomyza farfarae
leafminerAgromyzidaePhytomyza tussilaginis
leafminerGelechiidaeScrobipalpula tussilaginis
leafminerTephritidaeAcidia cognata
leafminerTephritidaeStemonocera cornuta
leafminerTephritidaeTrypeta zoe
leafpustuleaeciaPuccinialesPuccinia kummeri
leafpustuleaeciaPuccinialesPuccinia petasites-melicae
leafpustuleaeciaPuccinialesPuccinia petasites-poarum
leafpustuleaeciaPuccinialesPuccinia petasites-pulchellae
leafpustuleaeciaPuccinialesPuccinia ruttneri
leafpustuleaeciaPuccinialesPuccinia taminensis
leafpustuleuredinia teliaPuccinialesColeosporium petasitis
leafvagrantsummer generationAphididaeCapitophorus similis
root collarvagrantsummer generationAphididaeAnuraphis farfarae


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 10.xii.2021