treacle mustard

organ parasitic mode stage note taxonomic group parasite
unknown borer larva Curculionidae Ceutorhynchus chlorophanus
stem borer larva Curculionidae Ceutorhynchus picitarsis
fruit borer larva Curculionidae Ceutorhynchus rhenanus
root collar borer larva Curculionidae Lixus albomarginatus
root collar borer Curculionidae Melanobaris laticollis
stem gall Cecidomyiidae Janetiella fortiana
leaf vagrant Aphididae Lipaphis pseudobrassicae
stem miner Agromyzidae Ophiomyia alliariae
flower gall doubtful Aphididae Lipaphis turritella
flower gall Cecidomyiidae Contarinia nasturtii
flower gall Eriophyidae Aceria drabae
leaf down Erysiphales Erysiphe cruciferarum
leaf down Erysiphales Golovinomyces orontii
leaf down Peronosporales Hyaloperonospora cheiranthi
leaf down Peronosporales Hyaloperonospora parasitica
leaf miner Agromyzidae Liriomyza bryoniae
leaf miner Curculionidae Ceutorhynchus minutus
leaf miner Drosophilidae Scaptomyza flava
leaf pustule Albuginales Albiginaceae Albugo candida
leaf pustule aecia Pucciniales Puccinia isiacae
leaf pustule telia Pucciniales Puccinia holboelli
leaf pustule telia Pucciniales Puccinia thlaspeos
leaf vagrant Aphididae Lipaphis erysimi
stem gall Cecidomyiidae Bayeriola erysimi
stem gall Curculionidae Ceutorhynchus rapae
root collar gall Curculionidae Ceutorhynchus assimilis
root collar gall Curculionidae Ceutorhynchus plumbeus
root collar gall Plasmodiophorales Plasmodiophora brassicae
root gall Meloidogynidae Meloidogyne hapla

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.

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 3.vi.2019