organ parasitic mode stage note taxonomic group parasite
leaf vagrant Eriophyidae Aceria aculiformis
leaf miner>borer Ochsenheimeriidae Ochsenheimeria urella
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf gall Eriophyidae Abacarus hystrix
leaf miner Agromyzidae Cerodontha incisa
leaf miner main Agromyzidae Cerodontha melicae
leaf miner Agromyzidae Cerodontha pygmaea
leaf miner Agromyzidae Chromatomyia norwegica
leaf miner Elachistidae Elachista albidella
leaf miner Elachistidae Elachista apicipunctella
leaf miner Elachistidae Elachista atricomella
leaf miner Elachistidae Elachista cinereopunctella
leaf miner Elachistidae Elachista compsa
leaf miner Elachistidae Elachista gangabella
leaf miner Elachistidae Elachista luticomella
leaf miner Elachistidae Elachista obliquella
leaf miner Elachistidae Elachista subalbidella
leaf pustule uredinia telia Pucciniales Puccinia coronata
leaf pustule uredinia telia Pucciniales Puccinia erikssonii
leaf pustule uredinia telia Pucciniales Puccinia graminis
leaf pustule uredinia telia Pucciniales Puccinia melicae
leaf pustule uredinia telia Pucciniales Puccinia petasites-melicae
leaf pustule uredinia telia Pucciniales Puccinia trebouxii
leaf pustule Ustilaginales Ustilago trebouxii
leaf stripe uredinia telia Pucciniales Uromyces graminis
leaf stripe Tilletiales Tilletia melicae
leaf stripe Urocystidales Urocystis melicae
leaf stripe Ustilaginales Ustilago striiformis
stem gall Cecidomyiidae Mayetiola buhri

leaf vagrant Aphididae Sipha glyceriae
leaf vagrant Aphididae Sitobion avenae
leaf vagrant summer generation Aphididae Sitobion fragariae
leaf vagrant summer generation Aphididae Rhopalosiphum padi

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 18.ix.2019