downy willow

synonym: Salix marrubifolia

organ parasitic mode stage note taxonomic group parasite
leaf hidden Gelechiidae Carpatolechia notatella
leaf vagrant Aphididae Chaitophorus horii beuthani
leaf vagrant spring generation Aphididae Cavariella theobaldi
root collar borer Sesiidae Synanthedon polaris
leaf gall Eriophyidae Aculus tetanothrix
leaf gall Cecidomyiidae Rabdophaga marginemtorquens
bud gall Tenthredinidae Euura lappo
leaf gall Psyllidae Cacopsylla ambigua
leaf gall Psyllidae Cacopsylla brunneipennis
leaf gall Psyllidae Cacopsylla moscovita
leaf gall Psyllidae Cacopsylla nigrita
leaf gall Psyllidae Cacopsylla palmeni
leaf gall Psyllidae Cacopsylla propinqua
leaf gall Psyllidae Cacopsylla zaicevi
leaf gall Tenthredinidae Euura crassipes
leaf gall Tenthredinidae Euura samolad
leaf gall Tenthredinidae Euura acutiserra
leaf gall Tenthredinidae Euura plicalapponum
leaf gall Tenthredinidae Euura dolichura
leaf gall Tenthredinidae Euura venusta
leaf gall doubtful Tenthredinidae Euura destricta
leaf gall Tenthredinidae Euura arcticornis
leaf gall Triozidae Bactericera parastriola
leaf gall Triozidae Bactericera salicivora
leaf gall Triozidae Bactericera striola
leaf gall Triozidae Bactericera substriola
leaf miner Gracillariidae Phyllonorycter rolandi
leaf miner Lyonetiidae Lyonetia pulverulentella
leaf miner Nepticulidae Stigmella zelleriella
leaf miner Tenthredinidae Fenusella septentrionalis
leaf pustule uredinia telia Pucciniales Melampsora lapponum
stem gall Tenthredinidae Euura auritae
leaf vagrant Aphididae Chaitophorus capreae
stem vagrant Aphididae Pterocomma rufipes
stem vagrant Aphididae Chaitophorus lapponum
root vagrant doubtful Aphididae Pemphigus saliciradicis
stem vagrant Aphididae Pterocomma salicis
leaf vagrant spring generation Aphididae Cavariella aquatica


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 12.i.2020