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organ parasitic mode stage note taxonomic group parasite
leaf down Erysiphales Erysiphe heraclei
leaf gall Taphrinales Buerenia cicutae
leaf gall Taphrinales Protomyces macrosporus
leaf miner Agromyzidae Phytomyza cicutae
leaf miner Agromyzidae Phytomyza cicutivora
leaf miner Agromyzidae Phytomyza mylini
leaf miner Agromyzidae Phytomyza pastinacae
leaf miner Agromyzidae Phytomyza virosae
leaf miner Depressariidae Depressaria daucella
leaf miner Epermeniidae Epermenia chaerophyllella
leaf miner Tephritidae Euleia heraclei
leaf pustule Blastocladiales Physoderma vagans
leaf pustule aecia Pucciniales Uromyces lineolatus
leaf pustule aecia uredinia telia Pucciniales Puccinia cicutae
stem gall Curculionidae Lixus iridis
leaf vagrant summer generation Aphididae Cavariella aegopodii
leaf vagrant summer generation rarely Aphididae Cavariella pastinacae
stem vagrant Aphididae Cavariella cicutae
leaf vagrant summer generation Aphididae Cavariella konoi
leaf vagrant summer generation Aphididae Hyadaphis foeniculi
flower vagrant doubtful Aphididae Aphis grosmannae

Organ

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.

PARASITIC MODE

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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IMPORTANT

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 14.i.2018