Plant Parasites of Europe

leafminers, galls and fungi

Persicaria maculosa


synonym: Polygonum persicaria

organ parasitic mode stage note taxonomic group parasite
leaf leaf spot Phyllostictaceae Phyllosticta polygonorum
leaf leaf spot Mycosphaerellaceae Septoria polygonorum
leaf vagrant Noctuidae Caradrina morpheus
leaf vagrant Curculionidae Bagous czwalinai
root borer Chrysomelidae Chaetocnema concinna
leaf vagrant Chrysomelidae Gastrophysa polygoni
leaf vagrant Triozidae Bactericera nigricornis
leaf vagrant Tenthredinidae Euura albipennis
leaf vagrant Tenthredinidae Ametastegia equiseti
leaf vagrant Tenthredinidae Tenthredo mesomela
leaf vagrant larva Curculionidae Pelenomus quadrituberculatus
stem borer larva Curculionidae Rhinoncus perpendicularis
root collar borer larva Curculionidae Rhinoncus bruchoides
leaf vagrant larva doubtful Curculionidae Pelenomus commari
leaf vagrant summer generation rarely Aphididae Cryptomyzus galeopsidis
systemic borer Anguinidae Ditylenchus dipsaci
flower gall Microbotryales Microbotryum cordae
flower gall Microbotryales Sphacelotheca hydropiperis
flower gall Microbotryales Sphacelotheca polygoni-serrulati
flower gall Ustilaginales Melanopsichium pennsylvanicum
leaf gall Cecidomyiidae Wachtliella persicariae
leaf gall Psyllidae Aphalara freji
leaf miner Anthomyiidae Pegomya bicolor
leaf miner Gracillariidae Calybites phasianipennella
leaf pustule aecia doubtful Pucciniales Puccinia phragmitis
leaf pustule uredinia telia Pucciniales Puccinia polygoni-amphibii
leaf vagrant summer generation Aphididae Brachycaudus amygdalinus
leaf vagrant Eriophyidae Callyntrotus polygoni
stem down Erysiphales Erysiphe polygoni
stem gall doubtful Curculionidae Pelenomus velaris
root gall Heteroderidae Heterodera trifolii
root gall Meloidogynidae Meloidogyne hapla
leaf vagrant summer generation Aphididae Capitophorus hippophaes
leaf vagrant summer generation Aphididae Aphis nasturtii
leaf vagrant Aphididae Aphis polygonata


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 2.ix.2022