organ parasitic mode stage note taxonomic group parasite
leaf vagrant Eriophyidae Phyllocoptes castaneae
leaf vagrant Eriophyidae Acaricalus elegans
leaf vagrant Eriophyidae Aculus breviseta
leaf vagrant Eriophyidae Aculus longisetus
leaf vagrant Diptilomiopidae Rhyncaphytoptus castaneae
leaf leaf spot rarely Dothideales Pseudodidymella fagi
fruit borer rarely Pyralidae Nephopterix angustella
stem borer Elachistidae Dystebenna stephensi
fruit borer Tortricidae Cydia amplana
fruit borer larva Curculionidae Curculio elephas
fruit borer larva rarely Curculionidae Curculio propinquus
leaf gall larva Rhynchitidae Byctiscus betulae
leaf gall larva Rhynchitidae Deporaus betulae
leaf vagrant adult rarely Attelabidae Attelabus nitens
leaf gall larva rarely Attelabidae Attelabus nitens
leaf scale Aleyrodidae Trialeurodes vaporariorum
leaf scale Aleyrodidae Pealius quercus
stem scale Pseudococcidae Phenacoccus aceris
leaf vagrant rarely Tingidae Corythucha arcuata
stem scale Coccidae Parthenolecanium corni
stem scale Coccidae Parthenolecanium rufulum
stem scale Diaspididae Chionaspis lepineyi
stem borer Sesiidae Synanthedon vespiformis
leaf scale Coccidae Pulvinaria hydrangeae
stem gall Aphididae Lachnus pallipes
stem miner rarely Nepticulidae Zimmermannia longicaudella
leaf vagrant doubtful Aphididae Myzocallis komareki
leaf bud gall Cynipidae Dryocosmus kuriphilus
leaf down rarely Erysiphales Erysiphe alphitoides
leaf down Erysiphales Phyllactinia roboris
leaf gall rarely Cecidomyiidae Mikiola cristata
leaf miner Bucculatricidae Bucculatrix demaryella castaneae
leaf miner Bucculatricidae Bucculatrix ulmella
leaf miner Coleophoridae Coleophora anatipenella
leaf miner Coleophoridae Coleophora flavipennella
leaf miner Coleophoridae Coleophora lutipennella
leaf miner Coleophoridae Coleophora violacea
leaf miner Eriocraniidae Dyseriocrania subpurpurella
leaf miner Gracillariidae Caloptilia alchimiella
leaf miner Gracillariidae Caloptilia robustella
leaf miner Gracillariidae Phyllonorycter messaniella
leaf miner rarely Gracillariidae Povolnya leucapennella
leaf miner Incurvariidae Incurvaria masculella
leaf miner Nepticulidae Stigmella basiguttella
leaf miner Nepticulidae Stigmella samiatella
leaf miner rarely Nepticulidae Ectoedemia albifasciella
leaf miner Nepticulidae Ectoedemia heringi
leaf miner rarely Tenthredinidae Profenusa pygmaea
leaf miner Tischeriidae Tischeria decidua
stem gall rarely Loranthaceae Loranthus europaeus
stem gall Santalaceae Viscum album
stem miner Gracillariidae Spulerina simploniella
stem vagrant Aphididae Stomaphis quercus
stem vagrant Aphididae Lachnus roboris
leaf vagrant main Aphididae Myzocallis castanicola
systemic vagrant Aphididae Thelaxes suberi


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 20.ix.2019