organ parasitic mode stage note taxonomic group parasite
flower borer Gelechiidae Isophrictis striatella
leaf bud borer Pterophoridae Gillmeria pallidactyla
leaf vagrant summer generation Aphididae Brachycaudus helichrysi
root vagrant Aphididae Aphis vandergooti
leaf vagrant summer generation Aphididae Aphis nasturtii
leaf miner Agromyzidae Chromatomyia horticola
flower gall doubtful Tephritidae Tephritis nigricauda
stem miner Agromyzidae Ophiomyia disordens
fruit vagrant Coleophoridae Coleophora argentula
fruit gall Cecidomyiidae Ozirhincus millefolii
flower borer Tephritidae Tephritis angustipennis
flower gall Cecidomyiidae Rhopalomyia palearum
flower gall Cecidomyiidae Rhopalomyia ptarmicae
flower gall Tephritidae Campiglossa argyrocephala
leaf bud gall Cecidomyiidae Rhopalomyia millefolii
leaf down Erysiphales Golovinomyces macrocarpus
leaf down Erysiphales Leveillula picridis
leaf down Peronosporales Peronospora radii
leaf leaf spot Capnodiales Didymaria matricariae
leaf gall Psyllidae Craspedolepta nervosa
leaf miner Agromyzidae Liriomyza ptarmicae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Phytomyza corvimontana
leaf miner Agromyzidae Phytomyza ptarmicae
leaf miner Agromyzidae Phytomyza tanaceti
leaf miner Coleophoridae Coleophora gardesanella
leaf miner Coleophoridae Coleophora ptarmicia
leaf miner Tephritidae Trypeta artemisiae
leaf pustule Albuginales Pustula obtusata
leaf pustule Chytridiales Synchytrium aureum
leaf pustule Helotiales Schizothyrioma aterrimum
leaf pustule Helotiales Schizothyrioma ptarmicae
leaf pustule aecia Pucciniales Puccinia ptarmicae-caricis
leaf pustule aecia Pucciniales Puccinia vulpinae
leaf pustule telia Pucciniales Puccinia ptarmicae
leaf vagrant summer generation Aphididae Aphis fabae
stem borer Agromyzidae Napomyza lateralis
stem borer Agromyzidae Ophiomyia curvipalpis
leaf vagrant Aphididae Macrosiphoniella usquertensis
flower vagrant Aphididae Macrosiphoniella millefolii
leaf vagrant Aphididae Macrosiphoniella ptarmicae
flower miner Agromyzidae Liriomyza flavopicta


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.vii.2019