organ parasitic mode stage note taxonomic group parasite
leaf scale Aleyrodidae Pealius quercus
stem scale Pseudococcidae Phenacoccus aceris
stem scale Coccidae Pulvinaria vitis
stem scale Diaspididae Epidiaspis leperii
stem vagrant Psyllidae Baeopelma colorata
leaf bud gall Cecidomyiidae Contarinia trotteri
leaf leaf spot Taphrinales Taphrina ostryae
leaf gall Cecidomyiidae Zygiobia carpini
leaf gall Cecidomyiidae Aschistonyx carpinicolus
leaf gall doubtful Cecidomyiidae Dasineura ruebsaameni
leaf gall Eriophyidae Aceria tenella
leaf gall Eriophyidae Aculops macrotrichus
leaf miner Coleophoridae Coleophora serratella
leaf miner Eriocraniidae Paracrania chrysolepidella
leaf miner Gracillariidae Parornix carpinella
leaf miner Gracillariidae Phyllonorycter aemula
leaf miner Gracillariidae Phyllonorycter coryli
leaf miner Gracillariidae Phyllonorycter esperella
leaf miner Gracillariidae Phyllonorycter tenerella
leaf miner Incurvariidae Incurvaria pectinea
leaf miner Nepticulidae Stigmella carpinella
leaf miner Nepticulidae Stigmella johanssonella
leaf miner Nepticulidae Stigmella microtheriella
leaf pustule uredinia telia Pucciniales Melampsoridium carpini
leaf vagrant Eriophyidae Tegonotus depressus
leaf vagrant Eriophyidae Aculus comatus
stem borer Cerambycidae Oberea linearis
leaf vagrant Aphididae Pterocallis ostryae


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 19.ii.2019