Plant Parasites of Europe

leafminers, galls and fungi

Holcus mollis

creeping soft-grass

organparasitic modestagenotetaxonomic groupparasite
leafhiddenHesperiidaeThymelicus sylvestris
leafvagrantDelphacidaeJavesella discolor
leafvagrantDelphacidaeJavesella forcipata
leafvagrantDelphacidaeDicranotropis hamata
leafvagrantDelphacidaeHyledelphax elegantulus
leafvagrantDelphacidaeStiroma bicarinata
leafvagrantCicadellidaeArocephalus longiceps
leafvagrantCicadellidaeAthysanus argentarius
leafvagrantCicadellidaeBalclutha punctata
leafvagrantCicadellidaeElymana sulphurella
leafvagrantCicadellidaeErrastunus ocellaris
leafvagrantCicadellidaeJassargus pseudocellaris
leafvagrantDelphacidaeStreptanus aemulans
leafvagrantDelphacidaeMuellerianella fairmairei
leafvagrantCicadellidaeRecilia coronifer
leafvagrantCicadellidaeAnoscopus albifrons
leafvagrantCicadellidaeVerdanus abdominalis
leafvagrantTenthredinidaeDolerus nigratus
leafvagrantTenthredinidaeTenthredopsis friesei
leafscaleEriococcidaeAcanthococcus pseudinsignis
leafstripeUstilaginalesUstilago salveii
leafvagrantsummer generationAphididaeRhopalosiphum padi
fruitgallHypocrealesClaviceps purpurea
flowergallTilletialesTilletia holci
leafdownErysiphales ErysiphaceaeBlumeria graminis
leafleaf spotGeorgefischerialesJamesdicksonia dactylidis
leaffilmUstilaginalesTranzscheliella hypodytes
leafgallAnguinidaeAnguina graminis
leafgallPeronosporalesSclerophthora macrospora
leafminerAgromyzidaeAgromyza nigripes
leafminerAgromyzidaeCerodontha denticornis
leafminerAgromyzidaeCerodontha incisa
leafminerAgromyzidaeCerodontha muscina
leafminerAgromyzidaeChromatomyia milii
leafminerAgromyzidaeChromatomyia nigra
leafminerAgromyzidaeMetopomyza flavonotata
leafminerElachistidaeElachista albifrontella
leafminerElachistidaeElachista apicipunctella
leafminerElachistidaeElachista argentella
leafminermainElachistidaeElachista bifasciella
leafminerElachistidaeElachista canapennella
leafminerElachistidaeElachista diederichsiella
leafminerElachistidaeElachista dimicatella
leafminerElachistidaeElachista hedemanni
leafminerElachistidaeElachista rufocinerea
leafminerElachistidaeElachista subnigrella
leafminerElachistidaeElachista unifasciella
leafpustuleCantharellalesCeratorhiza rhizodes
leafpustuleuredinia teliaPuccinialesPuccinia coronata
leafpustuleuredinia teliaPuccinialesPuccinia holcina
leafstripeMicrobotryalesUstilentyloma brefeldii
leafstripeuredinia teliaPuccinialesPuccinia striiformis
leafvagrantEriophyidaeAculodes holcusi
stemgallAphididaeDiuraphis holci
stemgallCecidomyiidaeHaplodiplosis marginata
stemgallCecidomyiidaeHybolasioptera fasciata
stemgallCecidomyiidaeMayetiola holci
leafvagrantAphididaeSipha glyceriae
leafvagrantAphididaeSipha maydis
root collarvagrantAphididaeCryptaphis poae
leafvagrantAphididaeSchizaphis holci


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 22.iv.2021