organ parasitic mode stage note taxonomic group parasite
flower borer Adelidae Nemophora cupriacella
flower borer Adelidae Nemophora minimella
flower borer Alucitidae Alucita huebneri
fruit vagrant doubtful Coleophoridae Coleophora frischella
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant summer generation Aphididae Aphis fabae fabae
flower down Peronosporales Peronospora violacea
flower gall Cecidomyiidae Contarinia scabiosae
flower gall Microbotryales Microbotryum intermedium
flower vagrant spring generation Aphididae Aphis confusa
leaf bud gall Cecidomyiidae Jaapiella scabiosae
leaf bud gall Eriophyidae Aceria squalida
leaf down Erysiphales Erysiphe knautiae
leaf down Erysiphales Leveillula taurica
leaf down Erysiphales Podosphaera dipsacacearum
leaf down Peronosporales Peronospora knautiae
leaf gall Aphelenchoididae Aphelenchoides fragariae
leaf gall Triozidae Trioza munda
leaf miner Agromyzidae Aulagromyza similis
leaf miner Agromyzidae Chromatomyia ramosa
leaf miner Agromyzidae Chromatomyia scabiosae
leaf miner Agromyzidae Chromatomyia scabiosarum
leaf miner Agromyzidae Chromatomyia scabiosella
leaf miner Agromyzidae Chromatomyia succisae
leaf miner Agromyzidae Liriomyza strigata
leaf miner doubtful Buprestidae Trachys subglaber
leaf miner Buprestidae Trachys troglodytes
leaf miner Gracillariidae Phyllonorycter scabiosella
leaf miner Psychidae Apterona helicoidella
leaf miner Scythrididae Scythris siccella
leaf miner Tortricidae Rhopobota stagnana
leaf vagrant summer generation Aphididae Aphis confusa
stem gall Alucitidae Alucita grammodactyla
stem gall Asterolecaniidae Planchonia arabidis
root collar gall Actinomycetales Rhodococcus fascians
leaf vagrant Aphididae Ovatomyzus chamaedrys
root vagrant doubtful Aphididae Aphis psammophila
stem vagrant summer generation Aphididae Macrosiphum rosae
root collar vagrant Aphididae Aphis thomasi
stem vagrant Aphididae Macrosiphum weberi


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 29.vii.2019