Plant Parasites of Europe

leafminers, galls and fungi

Geranium pusillum


organ parasitic mode stage note taxonomic group parasite
leaf leaf spot Ascomycota incertae sedis Pestalozziella subsessilis
leaf vagrant Lycaenidae Aricia anteros
leaf vagrant Lycaenidae Aricia agestis
leaf vagrant Cicadellidae Hauptidia distinguenda
leaf vagrant Curculionidae Donus dauci
root vagrant Chrysomelidae Aphthona pallida
root vagrant Chrysomelidae Aphthona nigriceps
root collar borer larva Curculionidae Zacladus exiguus
leaf leaf spot Capnodiales Ramularia geranii
leaf miner Agromyzidae Liriomyza strigata
leaf down Erysiphales Erysiphe geraniacearum
leaf down Erysiphales Podosphaera fugax
leaf down Peronosporales Peronospora conglomerata
leaf leaf spot Venturiales Coleroa circinans
leaf gall Eriophyidae Aceria geranii
leaf miner Agromyzidae Agromyza nigrescens
leaf miner Tenthredinidae Fenella minuta
leaf pustule aecia Pucciniales Puccinia polygoni
leaf pustule aecia Pucciniales Puccinia polygoni-amphibii
leaf pustule aecia uredinia telia Pucciniales Uromyces geranii
leaf pustule aecia uredinia telia Pucciniales Uromyces kabatianus
leaf vagrant Aphididae Acyrthosiphon malvae malvae
leaf vagrant doubtful Eriophyidae Abacarus stadelbacheri
leaf vagrant Diptilomiopidae Quadracus geraniellus


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 26.viii.2022