Plant Parasites of Europe

leafminers, galls and fungi

genus Rheum

organ parasitic mode stage note taxonomic group parasite
leaf vagrant Lycaenidae Callophrys mystaphia
leaf scale Coccidae Pulvinaria hydrangeae
leaf vagrant Chrysomelidae Gastrophysa polygoni
systemic film Peronosporaceae Phytophthora cactorum
root film Platygloeales Helicobasidium purpureum
root film Ceratobasidiaceae Rhizoctonia solani
systemic down Sclerotiniaceae Botrytis cinerea
leaf leaf spot Didymellaceae Didymella rhei
leaf leaf spot Phyllostictaceae Phyllosticta rhei
fruit vagrant Coreidae Coreus marginatus
leaf vagrant adult Curculionidae Philopedon plagiatum
stem borer Noctuidae Hydraecia micacea
leaf vagrant Noctuidae Acronicta rumicis
leaf vagrant rarely Chrysomelidae Gastrophysa viridula
root borer Chrysomelidae Chaetocnema concinna
leaf vagrant Tenthredinidae Ametastegia equiseti
leaf vagrant Tenthredinidae Ametastegia glabrata
leaf miner younger larva Tortricidae Cnephasia asseclana
leaf hidden older larva Tortricidae Cnephasia asseclana
root collar borer larva Curculionidae Rhinoncus pericarpius
stem borer larva doubtful Curculionidae Lixus bardanae
root vagrant Aphididae Dysaphis emicis
leaf leaf spot Capnodiales Ramularia pratensis
systemic borer Anguinidae Ditylenchus dipsaci
flower vagrant Aphididae Aphis acetosae
leaf down Peronosporales Peronospora jaapiana
leaf miner Chrysomelidae Mantura rustica
leaf miner Curculionidae Hypera rumicis
leaf pustule aecia Pucciniales Puccinia phragmitis
leaf pustule uredinia telia Pucciniales Puccinia rhei-undulati
leaf pustule Urocystidales Thecaphora schwarzmaniana
leaf vagrant summer generation Aphididae Aphis fabae
stem down Erysiphales Erysiphe polygoni
leaf gall rarely Aphididae Aphis rumicis


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 3.i.2024