Plant Parasites of Europe

leafminers, galls and fungi

Juncus articulatus

jointed rush

synonym: Juncus aquaticus, bracteosus, geniculatus, lamprocarpus

organparasitic modestagenotetaxonomic groupparasite
stemborerNoctuidaeCoenobia rufa
leafvagrantNymphalidaeCoenonympha tullia
leafvagrantCicadellidaeMacrosteles sexnotatus
leafvagrantDelphacidaeConomelus anceps
leafvagrantDelphacidaeFlorodelphax leptosoma
leafvagrantCicadellidaeMacrosteles horvathi
rootborerChrysomelidaeChaetocnema subcoerulea
rootgalldoubtfulEntorrhizalesJuncorrhiza casparyana
flowerborerKateretidaeKateretes rufilabris
leafmineryounger larvaTenthredinidaeEutomostethus luteiventris
leafvagrantolder larvaTenthredinidaeEutomostethus luteiventris
root collarborerTortricidaeBactra lancealana
fruitvagrantColeophoridaeColeophora tamesis
fruitvagrantmainColeophoridaeColeophora taeniipennella
fruitvagrantColeophoridaeColeophora alticolella
fruitvagrantColeophoridaeColeophora glaucicolella
fruitvagrantColeophoridaeColeophora caespititiella
flowergallPsyllidaeLivia junci
leafminerAgromyzidaeCerodontha luctuosa
leafminerEphydridaeHydrellia nigricans
leafpustuleuredinia teliaPuccinialesUromyces junci
leafstripeUrocystidalesUrocystis tothii
stemminerBuprestidaeAphanisticus emarginatus
leafvagrantdoubtfulAphididaeAtheroides hirtellus
leafvagrantAphididaeSipha glyceriae
leafvagrantAphididaeSchizaphis palustris


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 17.ix.2021