synonym: Potentilla anserina

organ parasitic mode stage note taxonomic group parasite
leaf hidden Tortricidae Philedonides lunana
fruit borer Gelechiidae Monochroa elongella
leaf leaf spot Capnodiales Ramularia grevilleana
leaf vagrant Aphididae Aphis tormentillae
root collar vagrant Aphididae Aphis roepkei
systemic borer Anguinidae Ditylenchus dipsaci
leaf down Erysiphales Podosphaera aphanis
leaf down Peronosporales Peronospora potentillae-anserinae
leaf leaf spot Venturiales Venturia potentillae
leaf gall Eriophyidae Cecidophyes potentillae
leaf miner Agromyzidae Agromyza idaeiana
leaf miner Agromyzidae Agromyza sulfuriceps
leaf miner Buprestidae Trachys fragariae
leaf miner Nepticulidae Stigmella aeneofasciella
leaf miner Nepticulidae Stigmella poterii
leaf miner Nepticulidae Stigmella splendidissimella
leaf miner Nepticulidae Stigmella thuringiaca
leaf miner Tenthredinidae Fenella nigrita
leaf pustule Blastocladiales Physoderma vagans
leaf vagrant Eriophyidae Aceria anserina
leaf vagrant Triozidae Bactericera reuteri
leaf vagrant Aphididae Acyrthosiphon boreale
root vagrant Aphididae Rhopalosiphoninus latysiphon
leaf vagrant rarely Aphididae Chaetosiphon fragaefolii
root collar vagrant Aphididae Anthracosiphon hertae
leaf vagrant Aphididae Aulacorthum solani
leaf vagrant Aphididae Chaetosiphon potentillae


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 10.xi.2019