common bent

synonym: Agrostis polymorpha, silvatica, sylvatica, tarda, tenuis, vulgaris

organ parasitic mode stage note taxonomic group parasite
leaf gall Eriophyidae Abacarus hystrix
leaf vagrant Eriophyidae Aculodes capillarisi
leaf vagrant Eriophyidae Aculodes mckenziei
leaf scale Pseudococcidae Dysmicoccus walkeri
leaf leaf spot incertae sedis Mastigosporium rubricosum
root vagrant summer generation Aphididae Forda marginata
fruit gall Tarsonemidae Dendroptus krameri
leaf vagrant Eriophyidae Aceria tosichella
flower gall main Anguinidae Anguina agrostis
flower gall Tilletiales Tilletia sphaerococca
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf leaf spot Georgefischeriales Jamesdicksonia dactylidis
leaf leaf spot Phyllachorales Phyllachora graminis
leaf gall Anguinidae Anguina graminis
leaf gall Eriophyidae Aceria tenuis
leaf miner Agromyzidae Cerodontha incisa
leaf miner Agromyzidae Cerodontha pygmaea
leaf miner Agromyzidae Chromatomyia nigra
leaf pustule Cantharellales Ceratorhiza rhizodes
leaf pustule uredinia telia Pucciniales Puccinia agrostidis
leaf pustule uredinia telia Pucciniales Puccinia coronata
leaf pustule uredinia telia Pucciniales Puccinia graminis
leaf pustule uredinia telia rarely Pucciniales Puccinia pygmaea
leaf pustule uredinia telia Pucciniales Uromyces agrostidis
leaf pustule Urocystidales Urocystis agrostidis
leaf stripe Urocystidales Urocystis tessellata
leaf stripe Ustilaginales Ustilago striiformis
stem borer Chloropidae Oscinella smirnovi
stem borer Chloropidae Oscinella vastator
stem down Hypocreales Epichloe baconii
stem gall Cecidomyiidae Hybolasioptera fasciata
stem gall main Chloropidae Oscinella nitidissima
root collar gall Cecidomyiidae Mayetiola agrostidis
inquiline Eriophyidae Aculodes dubius
leaf vagrant Aphididae Sipha glyceriae
leaf vagrant Aphididae Sipha maydis
leaf vagrant Aphididae Sitobion avenae
leaf vagrant summer generation Aphididae Metopolophium dirhodum
leaf gall Anguinidae Subanguina graminophila


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.


mod 8.x.2019