synonym: Polygonum heterophyllum, neglectum

organ parasitic mode stage note taxonomic group parasite
root borer larva Curculionidae Amalus scortillum
leaf vagrant larva Curculionidae Pelenomus quadrituberculatus
unknown vagrant larva doubtful Curculionidae Neophytobius muricatus
unknown vagrant larva doubtful Curculionidae Neophytobius quadrinodosus
stem borer larva Curculionidae Rhinoncus perpendicularis
root collar borer larva Curculionidae Rhinoncus bruchoides
stem borer larva Apionidae Perapion lemoroi
stem gall Microbotryales Microbotryum nepalense
leaf vagrant summer generation Aphididae Rhopalosiphum padi
leaf vagrant Aphididae Sitobion avenae
leaf vagrant summer generation Aphididae Myzus persicae
stem borer Gelechiidae Monochroa hornigi
fruit vagrant Coleophoridae Coleophora aestuariella
systemic borer Anguinidae Ditylenchus dipsaci
flower gall Microbotryales Microbotryum aviculare
flower gall Ustilaginales Melanopsichium austro-americanum
flower gall Ustilaginales Melanopsichium pennsylvanicum
leaf down Erysiphales Leveillula taurica
leaf down Peronosporales Peronospora polygoni
leaf leaf spot doubtful Entylomatales Entyloma polygoni-amphibii
leaf gall Aphididae Aspidaphis adjuvans
leaf gall rarely Cecidomyiidae Wachtliella persicariae
leaf gall Psyllidae Aphalara avicularis
leaf miner main Chrysomelidae Mantura rustica
leaf miner Curculionidae Hypera rumicis
leaf miner Psychidae Apterona helicoidella
leaf miner Tortricidae Cnephasia lineata
leaf pustule aecia uredinia telia Pucciniales Uromyces polygoni-avicularis
leaf vagrant summer generation Aphididae Brachycaudus amygdalinus
stem down main Erysiphales Erysiphe polygoni
stem gall Coleophoridae Augasma aeratella
root gall Meloidogynidae Meloidogyne hapla
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant rarely Aphididae Sitobion avenae
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.


mod 12.vii.2019