Plant Parasites of Europe

leafminers, galls and fungi

Epilobium montanum

broad-leaved willowherb

synonym: Epilobium hypericifolium

organ parasitic mode stage note taxonomic group parasite
leaf leaf spot Capnodiales Ramularia epilobiana
leaf leaf spot Dothideales Phaeoramularia punctiformis
leaf vagrant Aphididae Aphis gossypii
leaf vagrant Geometridae Spargania luctuata
leaf vagrant Sphingidae Proserpinus proserpina
leaf vagrant Chrysomelidae Altica oleracea
leaf vagrant Chrysomelidae Altica lythri
leaf leaf spot Venturiales Venturia maculiformis
leaf vagrant summer generation rarely Aphididae Myzus lythri
fruit gall Momphidae Mompha subbistrigella
leaf down Erysiphales Podosphaera epilobii
leaf down Peronosporales Plasmopara epilobii
leaf miner Momphidae Mompha epilobiella
leaf miner Momphidae Mompha lacteella
leaf miner Momphidae Mompha langiella
leaf miner Momphidae Mompha locupletella
leaf miner Momphidae Mompha propinquella
leaf pustule Chytridiales Synchytrium aureum
leaf pustule aecia Pucciniales Puccinia veratri
leaf pustule aecia uredinia telia Pucciniales Puccinia pulverulenta
leaf pustule uredinia telia Pucciniales Pucciniastrum epilobii
leaf pustule telia Pucciniales Puccinia epilobii
leaf vagrant summer generation Aphididae Aphis grossulariae
stem gall Curculionidae Auleutes epilobii
stem gall Momphidae Mompha divisella
flower gall Aphididae Aphis epilobii
leaf vagrant Aphididae Aphis praeterita
stem vagrant main Aphididae Macrosiphum tinctum
leaf vagrant summer generation Aphididae Aphis frangulae
leaf gall rarely Aphididae Aphis epilobiaria


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 20.vii.2022