Plant Parasites of Europe

leafminers, galls and fungi

genus Humulus

organ parasitic mode stage note taxonomic group parasite
leaf vagrant Pyralidae Udea olivalis
root vagrant Tenebrionidae Opatrum sabulosum
leaf vagrant Noctuidae Orthosia incerta
root vagrant Hepialidae Hepialus humuli
root film Plectosphaerellaceae Verticillium albo-atrum
root film Plectosphaerellaceae Verticillium dahliae
systemic pustule Sclerotiniaceae Sclerotinia sclerotiorum
systemic film Pythiaceae Pythium perplexum
root film Peronosporaceae Phytophthora citricola
root film Platygloeales Helicobasidium purpureum
stem down Nectriaceae Fusarium sambucinum
stem kanker Nectriaceae Gibberella pulicaris
leaf leaf spot Pleosporales Phoma exigua var. exigua
leaf leaf spot Phaeosphaeriaceae Hendersonia lupuli
systemic down Sclerotiniaceae Botrytis cinerea
leaf leaf spot Didymellaceae Phaeomycocentrospora cantuariensis
leaf leaf spot Phyllostictaceae Phyllosticta lupulina
leaf leaf spot Didymellaceae Ascochyta humuli
leaf leaf spot Pleosporaceae Macrosporium cladosporioides
leaf leaf spot Phyllostictaceae Phyllosticta humuli
leaf leaf spot Didymellaceae Ascochyta humuliphila
leaf vagrant Miridae Apolygus lucorum
leaf vagrant Miridae Apolygus spinolae
leaf vagrant Miridae Lygocoris pabulinus
leaf vagrant Miridae Lygus rugulipennis
leaf vagrant adult Curculionidae Barynotus obscurus
leaf vagrant Nymphalidae Nymphalis vaualbum
leaf vagrant Noctuidae Ochropleura plecta
flower borer Cecidomyiidae Contarinia humuli
leaf vagrant Noctuidae Mniotype satura
leaf vagrant Noctuidae Caradrina morpheus
leaf vagrant Erebidae Hypena rostralis
leaf vagrant Noctuidae Abrostola triplasia
leaf vagrant Erebidae Hypena proboscidalis
leaf vagrant Geometridae Eupithecia assimilata
leaf vagrant Geometridae Eupithecia vulgata
leaf vagrant rarely Nymphalidae Aglais io
leaf vagrant doubtful Nymphalidae Vanessa atalanta
leaf vagrant rarely Nymphalidae Aglais urticae
leaf vagrant Nymphalidae Polygonia c-album
leaf vagrant Lycaenidae Celastrina argiolus
stem borer Mordellidae Mordellistena parvuliformis
leaf vagrant Acanaloniidae Acanalonia conica
stem borer Curculionidae Hypothenemus eruditus
root borer Curculionidae Neoplinthus tigratus
root borer Curculionidae Neoplinthus tigratus
leaf vagrant Miridae Closterotomus fulvomaculatus
flower hidden Thripidae Thrips albopilosus
stem borer Noctuidae Hydraecia micacea
leaf hidden Pyralidae Pleuroptya ruralis
leaf hidden Tortricidae Clepsis spectrana
leaf hidden Tortricidae Archips podana
leaf hidden Tortricidae Archips rosana
leaf hidden Tortricidae Argyrotaenia ljungiana
stem borer Tortricidae Grapholita discretana
stem borer Tortricidae Grapholita delineana
leaf hidden Tortricidae Adoxophyes orana
leaf hidden Tortricidae Cnephasia pasiuana
leaf hidden Tortricidae Sparganothis pilleriana
leaf hidden Tortricidae Cnephasia incertana
leaf scale Aleyrodidae Trialeurodes vaporariorum
leaf miner Agromyzidae Chromatomyia horticola
leaf vagrant Aphididae Aphis spiraecola
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant Aphididae Aphis gossypii
leaf down Erysiphales Golovinomyces orontii
leaf down Erysiphales Podosphaera macularis
leaf down Peronosporales Pseudoperonospora cubensis
leaf gall summer generation Aphididae Phorodon humuli
leaf miner doubtful Agromyzidae Agromyza anthracina
leaf miner Agromyzidae Agromyza flaviceps
leaf miner Agromyzidae Agromyza igniceps
leaf miner Coleophoridae Coleophora violacea
leaf miner Cosmopterigidae Cosmopterix zieglerella
leaf miner Gracillariidae Caloptilia fidella
leaf pustule Chytridiales Synchytrium aureum
leaf vagrant rarely Choreutidae Anthophila fabriciana
stem borer Crambidae Ostrinia nubilalis
root gall Heteroderidae Heterodera humuli
leaf vagrant Aphididae Aulacorthum circumflexum
leaf vagrant Aphididae Myzus ascalonicus


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 16.iii.2023