Plant Parasites of Europe

leafminers, galls and fungi

Avenula pubescens

downy oatgrass

synonym: Arrhenatherum, Avena, Avenastrum, Helictotrichon, pubescens

organ parasitic mode stage note taxonomic group parasite
leaf leaf spot Mycosphaerellaceae Graminopassalora graminis
leaf leaf spot Mycosphaerellaceae Ramularia holci-lanati
leaf leaf spot Mycosphaerellaceae Ramularia pusilla
leaf vagrant Noctuidae Eremobia ochroleuca
flower borer Chloropidae Dicraeus styriacus
leaf hidden Hesperiidae Thymelicus lineola
fruit borer Chloropidae Dicraeus tibialis
leaf vagrant Cicadellidae Euscelis incisus
leaf vagrant Cicadellidae Graphocraerus ventralis
leaf vagrant Cicadellidae Planaphrodes bifasciatus
leaf vagrant Cicadellidae Turrutus socialis
flower hidden Thripidae Chirothrips hamatus
stem borer Chloropidae Oscinimorpha sordidissima
leaf scale Eriococcidae Acanthococcus insignis
leaf vagrant Eriophyidae Aculodes mckenziei
leaf stripe Ustilaginales Ustilago scaura
leaf vagrant Eriophyidae Aceria tosichella
flower gall Cecidomyiidae Contarinia avenae
flower gall Eriophyidae Aceria cornuta
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf leaf spot Georgefischeriales Jamesdicksonia dactylidis
leaf gall Eriophyidae Abacarus hystrix
leaf gall Eriophyidae Aceria tenuis
leaf miner Agromyzidae Chromatomyia fuscula
leaf miner Agromyzidae Liriomyza flaveola
leaf miner older larva Coleophoridae Coleophora lixella
leaf miner Elachistidae Elachista albifrontella
leaf miner Elachistidae Elachista argentella
leaf miner Elachistidae Elachista canapennella
leaf miner Elachistidae Elachista herrichii
leaf miner Elachistidae Elachista subnigrella
leaf miner Elachistidae Elachista unifasciella
leaf pustule uredinia telia Pucciniales Puccinia coronata
leaf stripe Urocystidales Urocystis avenastri
stem gall Chloropidae Chlorops pumilionis


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 12.ix.2022