organ parasitic mode stage note taxonomic group parasite
root collar vagrant Aphididae Aphis linorum
leaf miner Agromyzidae Chromatomyia horticola
stem vagrant Aphididae Aphis lini
stem miner Nepticulidae Glaucolepis bleonella
stem vagrant Aphididae Aphis craccivora
unknown vagrant Aphididae Acyrthosiphon ilka
systemic borer Anguinidae Ditylenchus dipsaci
flower gall Cecidomyiidae Contarinia lini
leaf bud gall Cecidomyiidae Dasineura sampaina
leaf down Erysiphales Golovinomyces orontii
leaf down Erysiphales Leveillula taurica
leaf down doubtful Erysiphales Podosphaera lini
leaf down Peronosporales Peronospora lini
leaf leaf spot Entylomatales Entyloma lini
leaf gall Eriophyidae Aceria lini
leaf gall Tenthredinidae Rhogogaster chambersi
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Liriomyza xanthocera
leaf miner Coleophoridae Coleophora striolatella
leaf miner Gelechiidae Syncopacma linella
leaf miner Psychidae Apterona helicoidella
leaf pustule aecia uredinia telia Pucciniales Melampsora liniperda
leaf pustule uredinia telia Pucciniales Melampsora lini
stem borer Agromyzidae Napomyza lateralis
root gall Meloidogynidae Meloidogyne hapla
leaf vagrant summer generation Aphididae Aphis fabae fabae


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 23.i.2019