false london rocket

organ parasitic mode stage note taxonomic group parasite
leaf hidden Crambidae Evergestis frumentalis
unknown borer larva Ceutorynchus sisymbrii
fruit borer larva Curculionidae Ceutorhynchus pyrrhorhynchus
stem borer larva Curculionidae Ceutorhynchus picitarsis
stem miner Agromyzidae Aulagromyza sisymbrii
stem miner Agromyzidae Liriomyza pseudopygmina
fruit gall Cecidomyiidae Dasineura rostratae
flower gall Cecidomyiidae Contarinia nasturtii
flower gall Cecidomyiidae Gephyraulus sisymbrii
flower gall Eriophyidae Aceria drabae
leaf bud gall Cecidomyiidae Dasineura bayeri
leaf down Erysiphales Erysiphe cruciferarum
leaf down Peronosporales Hyaloperonospora sisymbrii-loeselii
leaf miner Agromyzidae Liriomyza brassicae
leaf miner Psychidae Apterona helicoidella
leaf pustule Albuginales Albiginaceae Albugo candida
root collar gall Curculionidae Ceutorhynchus assimilis
flower vagrant spring generation Aphididae Lipaphis fritzmuelleri
root collar vagrant summer generation Aphididae Lipaphis fritzmuelleri


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 7.i.2020