Plant Parasites of Europe

leafminers, galls and fungi

Juncus gerardi

synonym: Juncus attenuatus, lesbiacus, nitidiflorus

organ parasitic mode stage note taxonomic group parasite
fruit vagrant Coleophoridae Coleophora maritimella
leaf vagrant Miridae Teratocoris antennatus
leaf vagrant Lygaeidae Cymus melanocephalus
unknown unknown Chloropidae Melanum laterale
leaf vagrant Tingidae Agramma confusum
leaf vagrant Tingidae Agramma laetum
leaf vagrant Cicadellidae Macrosteles sordidipennis
leaf vagrant Cicadellidae Conosanus obsoletus
leaf vagrant Cicadellidae Macrosteles horvathi
leaf vagrant Delphacidae Javesella salina
root borer Chrysomelidae Chaetocnema sahlbergii
stem borer Chloropidae Microcercis trigonella
leaf vagrant Tenthredinidae Dolerus pachycerus
fruit vagrant Coleophoridae Coleophora tamesis
fruit vagrant Coleophoridae Coleophora adjunctella
fruit vagrant Coleophoridae Coleophora taeniipennella
fruit vagrant Coleophoridae Coleophora caespititiella
fruit vagrant Coleophoridae Coleophora glaucicolella
fruit gall Microbotryales Bauerago abstrusa
flower gall Psyllidae Livia junci
leaf miner Elachistidae Elachista carinisella
leaf miner Elachistidae Elachista scirpi
leaf miner Elachistidae Elachista utonella
leaf pustule uredinia telia Pucciniales Puccinia littoralis
leaf stripe Urocystidales Urocystis tothii
leaf vagrant doubtful Aphididae Atheroides serrulatus
leaf vagrant Aphididae Sipha maydis
leaf miner Agromyzidae Metopomyza junci
root collar borer Cecidomyiidae Procystiphora gerardi
leaf vagrant Aphididae Juncobia leegei


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 16.i.2023