organ parasitic mode stage note taxonomic group parasite
leaf hidden Depressariidae Agonopterix ciliella
leaf hidden Depressariidae Agonopterix heracliana
flower hidden Elachistidae Depressaria chaerophylli
leaf scale Aleyrodidae Aleyrodes lonicerae
leaf vagrant summer generation Aphididae Cavariella aegopodii
leaf vagrant summer generation Aphididae Aphis fabae fabae
leaf gall Triozidae Trioza laserpitii
stem borer Agromyzidae Melanagromyza chaerophylli
stem borer Agromyzidae Ophiomyia heracleivora
stem miner Agromyzidae Ophiomyia bohemica
fruit gall Cecidomyiidae Kiefferia pericarpiicola
flower gall Cecidomyiidae Lasioptera carophila
leaf down Erysiphales Erysiphe heraclei
leaf down Peronosporales Plasmopara chaerophylli
leaf gall Cecidomyiidae Macrolabis heraclei
leaf miner Agromyzidae Phytomyza aurei
leaf miner Agromyzidae Phytomyza chaerophylli
leaf miner Agromyzidae Phytomyza vilnensis
leaf pustule aecia uredinia telia Pucciniales Puccinia aromatica
leaf vagrant summer generation Aphididae Hyadaphis foeniculi
root collar vagrant summer generation Aphididae Dysaphis chaerophylli
flower vagrant Aphididae Macrosiphum gei
leaf vagrant Eriophyidae Epitrimerus chaerophylli


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 11.ii.2020