bay willow

organ parasitic mode stage note taxonomic group parasite
flower borer larva Curculionidae Dorytomus majalis
inquiline larva Apionidae Melanapion minimum
leaf gall Cecidomyiidae Rabdophaga salicis
stem borer doubtful Cecidomyiidae Rabdophaga nielsenii
leaf vagrant spring generation Aphididae Cavariella pastinacae
leaf down Erysiphales Erysiphe adunca
leaf gall Cecidomyiidae Iteomyia major
leaf gall Cecidomyiidae Rabdophaga nervorum
leaf gall Cecidomyiidae Rabdophaga terminalis
leaf gall Eriophyidae Aculus tetanothrix
leaf gall Psyllidae Cacopsylla brunneipennis
leaf gall Psyllidae Cacopsylla pulchra
leaf gall Tenthredinidae Euura destricta
leaf gall Tenthredinidae Euura proxima
leaf gall Triozidae Bactericera albiventris
leaf gall Triozidae Bactericera salicivora
leaf miner Agromyzidae Aulagromyza tridentata
leaf miner Chrysomelidae Zeugophora flavicollis
leaf miner Coleophoridae Coleophora lusciniaepennella
leaf miner Curculionidae Isochnus sequensi
leaf miner Curculionidae Rhamphus pulicarius
leaf miner Curculionidae Tachyerges decoratus
leaf miner Gracillariidae Caloptilia stigmatella
leaf miner rarely Gracillariidae Phyllocnistis labyrinthella
leaf miner Gracillariidae Phyllonorycter connexella
leaf miner Gracillariidae Phyllonorycter pastorella
leaf miner Lyonetiidae Lyonetia pulverulentella
leaf miner Nepticulidae Ectoedemia intimella
leaf miner doubtful Nepticulidae Ectoedemia occultella
leaf miner Nepticulidae Stigmella obliquella
leaf miner Nepticulidae Stigmella salicis
leaf miner Tenthredinidae Heterarthrus microcephalus
leaf oviposition scar Tenthredinidae Pristiphora conjugata
leaf pustule aecia uredinia telia rarely Pucciniales Melampsora amygdalinae
leaf pustule uredinia telia Pucciniales Melampsora allii-fragilis
leaf pustule uredinia telia Pucciniales Melampsora epitea
leaf pustule uredinia telia Pucciniales Melampsora galanthi-fragilis
leaf pustule uredinia telia Pucciniales Melampsora laricis-pentandrae
leaf pustule uredinia telia rarely Pucciniales Melampsora salicis-albae
leaf vagrant Eriophyidae Acaphyllisa salicobia
leaf vagrant Eriophyidae Aculus phyllocoptoides
stem gall Cecidomyiidae Rabdophaga lattkei
stem gall Santalaceae Viscum album
stem gall Tenthredinidae Euura amerinae
leaf vagrant Aphididae Chaitophorus niger
stem vagrant Aphididae Pterocomma rufipes
stem vagrant Aphididae Pterocomma salicis
leaf vagrant Aphididae Chaitophorus pentandrinus
leaf vagrant spring generation Aphididae Cavariella theobaldi

Organ

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.

PARASITIC MODE

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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IMPORTANT

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 27.iv.2019