organ parasitic mode stage note taxonomic group parasite
root scale Pseudococcidae Atrococcus cracens
leaf hidden doubtful Depressariidae Agonopterix kaekeritziana
flower borer Pyralidae Eurhodope cirrigerella
unknown unknown doubtful Pyralidae Epischnia prodromella
flower hidden Thripidae Thrips atratus
leaf miner younger larva Tortricidae Cnephasia stephensiana
leaf hidden older larva Tortricidae Cnephasia stephensiana
root borer Tortricidae Endothenia oblongana
flower borer Tortricidae Cochylis flaviciliana
root collar borer Tortricidae Selenodes karelica
root borer Tortricidae Agapeta zoegana
root borer Tortricidae Aethes hartmanniana
leaf vagrant Eriophyidae Epitrimerus knautiae
flower borer Pterophoridae Stenoptilia bipunctidactyla
flower borer younger larva Adelidae Nemophora metallica
flower borer Adelidae Nemophora cupriacella
leaf miner Agromyzidae Chromatomyia horticola
stem miner Agromyzidae Ophiomyia longilingua
systemic borer Anguinidae Ditylenchus dipsaci
flower down Peronosporales Peronospora violacea
flower gall Cecidomyiidae Contarinia dipsacearum
flower gall Microbotryales Microbotryum flosculorum
flower gall Microbotryales Microbotryum scabiosae
flower vagrant spring generation Aphididae Aphis confusa
leaf bud gall Cecidomyiidae Jaapiella knautiae
leaf bud gall Eriophyidae Aceria squalida
leaf down Erysiphales Erysiphe knautiae
leaf down Erysiphales Podosphaera dipsacacearum
leaf down Peronosporales Peronospora knautiae
leaf leaf spot Capnodiales Ramularia tricherae
leaf gall Triozidae Trioza munda
leaf miner Agromyzidae Aulagromyza similis
leaf miner Agromyzidae Chromatomyia ramosa
leaf miner Agromyzidae Chromatomyia scabiosarum
leaf miner Agromyzidae Chromatomyia succisae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Agromyza woerzi
leaf miner doubtful Buprestidae Trachys subglaber
leaf miner Buprestidae Trachys troglodytes
leaf miner Depressariidae Agonopterix arenella
leaf pustule Chytridiales Synchytrium succisae
leaf pustule aecia Pucciniales Aecidium succisae
leaf vagrant summer generation Aphididae Aphis confusa
stem gall Asterolecaniidae Planchonia arabidis
leaf vagrant Aphididae Aulacorthum knautiae
leaf vagrant Aphididae Aulacorthum sedens
leaf vagrant Aphididae Ovatomyzus boraginacearum
stem vagrant summer generation Aphididae Macrosiphum rosae
root collar vagrant rarely Aphididae Aphis thomasi
leaf vagrant Aphididae Macrosiphum knautiae


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.ii.2020