Plant Parasites of Europe

leafminers, galls and fungi

Geranium robertianum


organparasitic modestagenotetaxonomic groupparasite
leafvagrantrarelyPentatomidaeEysarcoris venustissimus
leafvagrantRhopalidaeRhopalus subrufus
predatorMiridaeDicyphus epilobii
predatorMiridaeDicyphus errans
predatorMiridaeDicyphus flavoviridis
leafhiddenTortricidaeArchips rosana
leafminerZygaenidaeAdscita geryon
leafvagrantdoubtfulLycaenidaeCacyreus marshalli
leafvagrantCicadellidaeOphiola decumana
leafvagrantCicadellidaeHauptidia distinguenda
leafvagrantCicadellidaeHauptidia provincialis
flowerhiddenThripidaeTaeniothrips picipes
rootvagrantChrysomelidaeAphthona pallida
rootvagrantChrysomelidaeAphthona nigriceps
leafvagrantTenthredinidaeAmetastegia carpini
flowerborerPterophoridaeAmblyptilia acanthadactyla
fruitborerlarvaCurculionidaeZacladus geranii
root collarborerlarvaCurculionidaeZacladus exiguus
leafleaf spotCapnodialesRamularia geranii
root collarvagrantAphididaeMaculolachnus submacula
leafvagrantsummer generationAphididaeAphis nasturtii
leafdownErysiphalesErysiphe geraniacearum
leafdownErysiphalesPodosphaera fugax
leafdownPeronosporalesPeronospora conglomerata
leafleaf spotVenturialesColeroa robertiani
leafgallEriophyidaeAceria geranii
leafgallEriophyidaeEpitrimerus geranii
leafminerAgromyzidaeAgromyza nigrescens
leafpustuleaecia uredinia teliaPuccinialesUromyces geranii
leafvagrantAphididaeAcyrthosiphon malvae malvae
leafvagrantEriophyidaeEpitrimerus femoralis
stemgallAsterolecaniidaePlanchonia arabidis


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 8.iv.2022