Plant Parasites of Europe

leafminers, galls and fungi

Pilosella officinarum


synonym: Hieracium pilosella

organ parasitic mode stage note taxonomic group parasite
stem vagrant Tettigometridae Tettigometra impressopunctata
root vagrant Tenebrionidae Opatrum sabulosum
root vagrant larva Curculionidae Romualdius scaber
leaf vagrant Tingidae Kalama henschi
leaf vagrant Thripidae Frankliniella nigriventris
leaf leaf spot Phyllostictaceae Phyllosticta hieracii
leaf leaf spot Mycosphaerellaceae Septoria mougeotii
predator Ormyridae Ormyrus salmanticus
predator Pteromalidae Pteromalus isarchus
leaf vagrant rarely Miridae Strongylocoris luridus
leaf vagrant Miridae Macrotylus herrichi
leaf vagrant Tingidae Kalama tricornis
root collar vagrant Pentatomidae Sciocoris cursitans
leaf vagrant Miridae Orthocephalus saltator
leaf vagrant Miridae Hoplomachus thunbergii
root vagrant Curculionidae Trachyphloeus bifoveolatus
scale Pseudococcidae Fonscolombia europaea
flower vagrant Noctuidae Hecatera bicolorata
flower vagrant Noctuidae Hecatera dysodea
leaf miner Agromyzidae Liriomyza hieracii
flower predator Cecidomyiidae Lestodiplosis hieracii
leaf vagrant Noctuidae Epilecta linogrisea
leaf vagrant Noctuidae Xestia ashworthii
flower vagrant Noctuidae Heliothis viriplaca
leaf vagrant Erebidae Arctia caja
leaf vagrant Noctuidae Autographa bractea
leaf vagrant doubtful Erebidae Arctia festiva
leaf vagrant Brahmaeidae Lemonia dumi
flower borer Anthomyiidae Heterostylodes nominabilis
flower borer Anthomyiidae Heterostylodes pilifera
leaf vagrant Cicadellidae Neoaliturus fenestratus
leaf vagrant Cicadellidae Erythria alpina
leaf vagrant Cicadellidae Eupteryx notata
leaf vagrant Tingidae Galeatus maculatus
flower borer Tephritidae Tephritis matricariae
flower hidden Thripidae Thrips physapus
leaf hidden Thripidae Thrips tabaci
flower hidden Thripidae Thrips validus
flower hidden Thripidae Tenothrips frici
unknown unknown Chrysomelidae Cyrtonus punctipennis
stem scale Coccidae Parthenolecanium corni
leaf vagrant Pterophoridae Oxyptilus ericetorum
leaf hidden Pterophoridae Crombrugghia tristis
leaf hidden Pterophoridae Oxyptilus pilosellae
leaf hidden Pterophoridae Oxyptilus parvidactyla
leaf hidden Scythrididae Scythris laminella
root borer Crambidae Scoparia subfusca
flower vagrant Pterophoridae Crombrugghia distans
leaf hidden Tortricidae Clepsis pallidana
leaf miner younger larva Tortricidae Cnephasia longana
flower hidden older larva Tortricidae Cnephasia longana
unknown borer doubtful Syrphidae Cheilosia mutabilis
root vagrant Syrphidae Cheilosia urbana
stem borer Syrphidae Cheilosia psilophthalma
leaf miner Curculionidae Orthochaetes setiger
stem vagrant Aphididae Uroleucon pseudobscurum
stem vagrant Ortheziidae Orthezia urticae
leaf gall Aphididae Nasonovia compositellae nigra
flower gall Cecidomyiidae Contarinia pilosellae
leaf down Peronosporales Bremia lactucae
leaf leaf spot Capnodiales Ramularia inaequalis
leaf vagrant Aphididae Aphis gossypii
root collar vagrant main Aphididae Aphis pilosellae
stem vagrant Aphididae Uroleucon cichorii
systemic borer Anguinidae Ditylenchus dipsaci
flower gall Cecidomyiidae Jaapiella compositarum
flower gall Tephritidae Noeeta pupillata
flower gall Tephritidae Tephritis ruralis
leaf down Erysiphales Golovinomyces cichoracearum
leaf down Erysiphales Podosphaera erigerontis-canadensis
leaf leaf spot Entylomatales Entyloma hieracii
leaf gall Aphididae Nasonovia pilosellae
leaf gall Cecidomyiidae Cystiphora sanguinea
leaf gall Cecidomyiidae Dasineura nervicola
leaf gall Cecidomyiidae Macrolabis pilosellae
leaf gall Cynipidae Aulacidea pilosellae
leaf gall Eriophyidae Aceria pilosellae
leaf gall Triozidae Trioza proxima
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Phytomyza rufescens
leaf miner Cosmopterigidae Vulcaniella pomposella
leaf miner Curculionidae Orthochaetes insignis
leaf miner main Scythrididae Scythris siccella
leaf miner Tephritidae Trypeta immaculata
leaf pustule Chytridiales Synchytrium aureum
leaf pustule uredinia telia Pucciniales Puccinia piloselloidearum
root gall Cynipidae Aulacidea subterminalis
flower borer Cecidomyiidae Jaapiella pilosellae
leaf vagrant summer generation Aphididae Nasonovia ribisnigri
leaf vagrant Aphididae Pleotrichophorus deviatus
stem vagrant Aphididae Uroleucon obscurum
flower vagrant main Aphididae Uroleucon pilosellae
leaf gall Aphididae Nasonovia compositellae


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 9.ix.2023