synonym: Pirus communis

organ parasitic mode stage note taxonomic group parasite
leaf pustule aecia doubtful Pucciniales Gymnosporangium asiaticum
stem borer spring generation rarely Gelechiidae Anarsia lineatella
fruit borer summer generation Gelechiidae Anarsia lineatella
leaf bud borer larva Curculionidae Anthonomus kirschi
leaf gall larva Rhynchitidae Byctiscus betulae
leaf miner Rhynchitidae Neocoenorrhinus pauxillus
leaf scale Aleyrodidae Siphoninus phillyreae
leaf vagrant spring generation doubtful Aphididae Rhopalosiphum nymphaeae
leaf vagrant Aphididae Sappaphis piri
stem gall Diaspididae Chionaspis salicis
stem scale Diaspididae Lepidosaphes ulmi
leaf bud gall Curculionidae Anthonomus spilotus
leaf gall spring generation Aphididae Dysaphis plantaginea
stem borer Sesiidae Synanthedon myopaeformis
leaf leaf spot Venturiales Venturia pyrina
stem scale rarely Coccidae Pulvinaria vitis
leaf vagrant Psyllidae Cacopsylla notata
stem vagrant Psyllidae Cacopsylla bidens
leaf vagrant Aphididae Macrosiphum euphorbiae
leaf vagrant Tenuipalpidae Cenopalpus pulcher
leaf gall spring generation Aphididae Schizaphis pyri
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant summer generation Aphididae Aphis fabae fabae
fruit gall Cecidomyiidae Contarinia pyrivora
fruit gall Thripidae Closterotomus fulvomaculatus
fruit pustule Helotiales Monilinia fructigena
flower gall Curculionidae Anthonomus piri
flower gall rarely Curculionidae Anthonomus pomorum
leaf bud gall Cecidomyiidae Apiomyia bergenstammi
leaf down Erysiphales Phyllactinia mali
leaf down Erysiphales Podosphaera clandestina
leaf down Erysiphales Podosphaera leucotricha
leaf gall Aphididae Aphis pomi
leaf gall spring generation Aphididae Anuraphis catonii
leaf gall spring generation Aphididae Anuraphis farfarae
leaf gall spring generation Aphididae Anuraphis subterranea
leaf gall spring generation Aphididae Dysaphis pyri
leaf gall spring generation Aphididae Melanaphis pyraria
leaf gall Cecidomyiidae Dasineura pyri
leaf gall Eriophyidae Epitrimerus marginemtorquens
leaf gall Eriophyidae Eriophyes pseudoinsidiosus
leaf gall Eriophyidae Eriophyes pyri
leaf gall Psyllidae Cacopsylla mali
leaf gall Psyllidae Cacopsylla melanoneura
leaf gall Psyllidae Cacopsylla pyri
leaf gall Psyllidae Cacopsylla pyricola
leaf gall Psyllidae Cacopsylla pyrisuga
leaf gall Taphrinales Taphrina bullata
leaf miner rarely Agromyzidae Phytomyza heringiana
leaf miner Bucculatricidae Bucculatrix bechsteinella
leaf miner Buprestidae Trachys minutus
leaf miner Coleophoridae Coleophora anatipenella
leaf miner Coleophoridae Coleophora currucipennella
leaf miner Coleophoridae Coleophora hemerobiella
leaf miner main Coleophoridae Coleophora kroneella
leaf miner Coleophoridae Coleophora spinella
leaf miner Coleophoridae Coleophora violacea
leaf miner Curculionidae Rhamphus oxyacanthae
leaf miner Gelechiidae Recurvaria nanella
leaf miner rarely Gracillariidae Callisto denticulella
leaf miner Gracillariidae Parornix anguliferella
leaf miner Gracillariidae Phyllonorycter anceps
leaf miner Gracillariidae Phyllonorycter corylifoliella
leaf miner Gracillariidae Phyllonorycter hostis
leaf miner Gracillariidae Phyllonorycter mespilella
leaf miner Gracillariidae Phyllonorycter oxyacanthae
leaf miner Gracillariidae Phyllonorycter sorbi
leaf miner Incurvariidae Incurvaria pectinea
leaf miner Lyonetiidae Leucoptera malifoliella
leaf miner Lyonetiidae Lyonetia clerkella
leaf miner Lyonetiidae Lyonetia prunifoliella
leaf miner doubtful Nepticulidae Bohemannia pulverosella
leaf miner Nepticulidae Ectoedemia atricollis
leaf miner Nepticulidae Stigmella desperatella
leaf miner Nepticulidae Stigmella minusculella
leaf miner Nepticulidae Stigmella oxyacanthella
leaf miner Nepticulidae Stigmella pyri
leaf miner Nepticulidae Stigmella stettinensis
leaf miner Yponomeutidae Scythropia crataegella
leaf oviposition scar Tenthredinidae Pristiphora abbreviata
leaf pustule aecia Pucciniales Gymnosporangium clavariiforme
leaf pustule aecia Pucciniales Gymnosporangium confusum
leaf pustule aecia Pucciniales Gymnosporangium dobozrakovae
leaf pustule aecia Pucciniales Gymnosporangium sabinae
leaf pustule aecia Pucciniales Gymnosporangium tremelloides
leaf pustule uredinia telia Pucciniales Ochropsora ariae
leaf vagrant spring generation Aphididae Rhopalosiphum oxyacanthae
leaf vagrant Eriophyidae Aculus schlechtendali
leaf vagrant Eriophyidae Epitrimerus pyri
stem borer Cecidomyiidae Resseliella oculiperda
stem gall summer generation Aphididae Eriosoma lanigerum
stem scale Diaspididae Epidiaspis leperii
leaf scale rarely Diaspididae Carulaspis juniperi
systemic scale Diaspididae Parlatoria oleae
stem gall Hypocreales Neonectria galligena
stem gall Santalaceae Viscum album
root vagrant summer generation Aphididae Eriosoma flavum
root vagrant summer generation Aphididae Eriosoma lanuginosum
leaf gall spring generation Aphididae Dysaphis reaumuri
stem scale Pseudococcidae Phenacoccus aceris
stem vagrant Aphididae Aphis craccivora
stem scale Coccidae Parthenolecanium corni
leaf vagrant spring generation rarely Aphididae Ovatus insitus
leaf vagrant Aphididae Aphis spiraecola
stem vagrant Aphididae Aphis aurantii
fruit vagrant Aphididae Aphanostigma piri
leaf vagrant Aphididae Aphis gossypii


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.viii.2019