Plant Parasites of Europe

leafminers, galls and fungi

Oxalis acetosella


organ parasitic mode stage note taxonomic group parasite
leaf leaf spot Ascomycota incertae sedis Gyoerffyella oxalidis
leaf leaf spot Sclerotiniaceae Valdensia heterodoxa
leaf leaf spot Diaporthaceae Phomopsis oxalina
leaf leaf spot Phyllostictaceae Phyllosticta oxalidis
leaf leaf spot Massarinaceae Stagonospora hygrophila
leaf vagrant Geometridae Dysstroma citrata
leaf vagrant Geometridae Dysstroma truncata
unknown unknown Curculionidae Rutidosoma monticola
unknown unknown larva Curculionidae Rutidosoma fallax
leaf scale Aleyrodidae Aleyrodes lonicerae
leaf down Erysiphales Leveillula oxalidicola
leaf gall Eriophyidae Aceria oxalidis
leaf gall Urocystidales Melanoxa oxalidiella
leaf miner Anthomyiidae Pegomya seitenstettensis
leaf vagrant Aphididae Aulacorthum solani


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.


Last modified 27.x.2022