organ parasitic mode stage note taxonomic group parasite
leaf stripe Ustilaginales Ustilago milii
leaf vagrant summer generation Aphididae Rhopalosiphum padi
leaf vagrant Aphididae Sitobion avenae
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf gall Eriophyidae Aceria tenuis
leaf miner Agromyzidae Cerodontha incisa
leaf miner Agromyzidae Cerodontha muscina
leaf miner Agromyzidae Cerodontha pygmaea
leaf miner main Agromyzidae Chromatomyia milii
leaf miner Agromyzidae Chromatomyia nigra
leaf miner Agromyzidae Liriomyza flaveola
leaf miner doubtful Agromyzidae Agromyza albipennis
leaf miner Agromyzidae Agromyza mobilis
leaf miner Agromyzidae Agromyza nigrella
leaf miner Cosmopterigidae Cosmopterix orichalcea
leaf miner Elachistidae Elachista albifrontella
leaf miner Elachistidae Elachista apicipunctella
leaf miner Elachistidae Elachista atricomella
leaf miner Elachistidae Elachista bifasciella
leaf miner Elachistidae Elachista cingillella
leaf miner main Elachistidae Elachista diederichsiella
leaf miner Elachistidae Elachista dimicatella
leaf miner Elachistidae Elachista elegans
leaf miner Elachistidae Elachista luticomella
leaf miner Elachistidae Elachista metella
leaf miner Elachistidae Elachista obliquella
leaf miner Elachistidae Elachista stabilella
leaf miner Elachistidae Elachista unifasciella
leaf miner Tortricidae Cnephasia asseclana
leaf miner Tortricidae Cnephasia incertana
leaf miner Tortricidae Cnephasia stephensiana
leaf pustule uredinia telia Pucciniales Puccinia coronata
leaf pustule uredinia telia Pucciniales Puccinia graminis
leaf pustule uredinia telia Pucciniales Puccinia milii-effusi
leaf pustule uredinia telia rarely Pucciniales Puccinia poae-nemoralis
leaf vagrant summer generation Aphididae Sitobion fragariae
stem gall Cecidomyiidae Mayetiola spec. on Milium effusum

Organ

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.

PARASITIC MODE

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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IMPORTANT

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 12.viii.2019