pale toad-flax

synonym: Linaria striata

organ parasitic mode stage note taxonomic group parasite
stem gall larva Curculionidae Mecinus janthinus
fruit borer larva Curculionidae Rhinusa melas
stem gall Curculionidae Mecinus barbarus
fruit gall Curculionidae Rhinusa antirrhini
fruit gall Curculionidae Rhinusa neta
leaf down Erysiphales Golovinomyces orontii
leaf down doubtful Peronosporales Peronospora flava
leaf down Peronosporales Peronospora linariae
leaf leaf spot Entylomatales Entyloma linariae
leaf gall Ustilaginales Melanotaenium cingens
stem gall doubtful Curculionidae Mecinus dorsalis
root gall Curculionidae Rhinusa linariae


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 9.vii.2019