synonym: Pyrus amygdaliformis, amygdaloides, cuneifolia

organ parasitic mode stage note taxonomic group parasite
leaf oviposition scar Tenthredinidae Pristiphora abbreviata
leaf vagrant Tenuipalpidae Cenopalpus pritchardi
leaf gall Eriophyidae Eriophyes pyri
leaf vagrant Eriophyidae Epitrimerus pyri
leaf vagrant Psyllidae Cacopsylla notata
leaf miner Nepticulidae Stigmella irregularis
fruit gall Cecidomyiidae Contarinia pyrivora
leaf bud gall Cecidomyiidae Apiomyia bergenstammi
leaf gall spring generation Aphididae Dysaphis pyri
leaf gall Cecidomyiidae Dasineura pyri
leaf gall Psyllidae Cacopsylla pyrisuga
leaf miner Gracillariidae Parornix anguliferella
leaf miner Gracillariidae Phyllonorycter corylifoliella
leaf miner Nepticulidae Stigmella minusculella
leaf miner Nepticulidae Stigmella oxyacanthella
leaf pustule aecia Pucciniales Gymnosporangium sabinae
stem scale Diaspididae Epidiaspis leperii
leaf gall spring generation Aphididae Dysaphis reaumuri


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 4.xii.2019