organ parasitic mode stage note taxonomic group parasite
root borer larva Curculionidae Melanobaris morio
root collar borer larva Curculionidae Lixus albomarginatus
stem borer rarely Curculionidae Ceutorhynchus napi
root collar gall rarely Curculionidae Ceutorhynchus assimilis
fruit borer larva Anthribidae Bruchela rufipes
flower vagrant adult Anthribidae Bruchela rufipes
fruit borer Anthribidae Bruchela suturalis
fruit borer Anthribidae Bruchela conformis
leaf miner Agromyzidae Chromatomyia horticola
leaf leaf spot Capnodiales Cercospora resedae
stem vagrant Aphididae Aphis craccivora
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant summer generation Aphididae Aphis fabae solanella
leaf down Erysiphales Erysiphe cruciferarum
leaf down Erysiphales Leveillula taurica
leaf down Peronosporales Hyaloperonospora crispula
leaf miner Agromyzidae Liriomyza brassicae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Liriomyza xanthocera
leaf miner Curculionidae Ceutorhynchus minutus
leaf miner Drosophilidae Scaptomyza flava
leaf miner Plutellidae Plutella xylostella
leaf miner Psychidae Apterona helicoidella
leaf pustule Albuginales Albiginaceae Albugo resedae
leaf pustule aecia Pucciniales Puccinia isiacae
stem borer Curculionidae Ceutorhynchus pallidactylus
stem gall doubtful Curculionidae Ceutorhynchus carinatus
root collar borer Curculionidae Ceutorhynchus resedae
root collar gall doubtful Plasmodiophorales Plasmodiophora brassicae
stem vagrant rarely Aphididae Acyrthosiphon pisum


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 18.v.2019