Plant Parasites of Europe

leafminers, galls and fungi

Elymus caninus

bearded couch

synonym: Agropyron caninum, donianum; Elytrigia, Roegneria, canina

organ parasitic mode stage note taxonomic group parasite
leaf leaf spot Phyllachoraceae Phyllachora graminis
leaf vagrant Noctuidae Apamea scolopacina
fruit borer Chloropidae Dicraeus rossicus
leaf hidden Hesperiidae Ochlodes sylvanus
leaf vagrant Nymphalidae Coenonympha pamphilus
leaf miner>borer Ochsenheimeriidae Ochsenheimeria vacculella
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf down Peronosporales Sclerospora graminicola
leaf film Ustilaginales Tranzscheliella hypodytes
leaf gall Aphididae Diuraphis frequens
leaf gall Peronosporales Sclerophthora macrospora
leaf gall Tarsonemidae Steneotarsonemus canestrinii
leaf miner Agromyzidae Agromyza nigrociliata
leaf miner Agromyzidae Cerodontha pygmaea
leaf miner Elachistidae Elachista adscitella
leaf miner Elachistidae Elachista apicipunctella
leaf pustule Cantharellales Ceratorhiza rhizodes
leaf pustule uredinia telia Pucciniales Puccinia actaeae-agropyri
leaf pustule uredinia telia Pucciniales Puccinia agropyri
leaf pustule uredinia telia Pucciniales Puccinia cerinthes-agropyrina
leaf pustule uredinia telia Pucciniales Puccinia clematidis-secalis
leaf pustule uredinia telia Pucciniales Puccinia graminis
leaf pustule Urocystidales Urocystis agropyri
leaf stripe uredinia telia Pucciniales Puccinia striiformis
leaf stripe Ustilaginales Ustilago serpens
stem gall Cecidomyiidae Hybolasioptera fasciata
stem gall Chloropidae Chlorops pumilionis
stem gall Eurytomidae Tetramesa hordei
stem gall Eurytomidae Tetramesa hyalipennis


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.v.2023