rosebay willowherb

synonym: Chamaenerion angustifolium; Epilobium angustifolium, gesneri, spicatum

organ parasitic mode stage note taxonomic group parasite
leaf hidden Tortricidae Clepsis spectrana
leaf miner younger larva Tortricidae Cnephasia stephensiana
leaf hidden older larva Tortricidae Cnephasia stephensiana
leaf vagrant doubtful Aphididae Aphis praeterita
root borer Momphidae Mompha idaei
fruit borer summer generation Momphidae Mompha sturnipennella
flower gall Cecidomyiidae Dasineura epilobii
leaf down Erysiphales Podosphaera epilobii
leaf gall Cecidomyiidae Dasineura kiefferiana
leaf gall Diaporthales Apiognomonia errabunda
leaf gall Eriophyidae Phyllocoptes epilobiorum
leaf miner Momphidae Mompha epilobiella
leaf miner Momphidae Mompha langiella
leaf miner Momphidae Mompha raschkiella
leaf miner Momphidae Mompha sexstrigella
leaf pustule aecia uredinia telia Pucciniales Puccinia pulverulenta
leaf pustule uredinia telia Pucciniales Pucciniastrum epilobii
leaf pustule telia Pucciniales Puccinia gigantea
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant summer generation Aphididae Aphis frangulae
leaf vagrant summer generation Aphididae Aphis salicariae
leaf vagrant Eriophyidae Epitrimerus chamaenerii
stem borer spring generation Momphidae Mompha sturnipennella
stem gall main Curculionidae Auleutes epilobii
stem gall doubtful Momphidae Mompha divisella
root gall Psyllidae Craspedolepta nebulosa
root gall Psyllidae Craspedolepta subpunctata
leaf vagrant summer generation main Aphididae Aphis frangulae frangulae
systemic vagrant Aphididae Aphis mirifica
stem vagrant Aphididae Macrosiphum tinctum
leaf vagrant Aphididae Macrosiphum lisae


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.


mod 6.xii.2019