lyme grass

synonym: Elymus arenarius; Hordeum arenarium

organ parasitic mode stage note taxonomic group parasite
flower gall Anguinidae Anguina agrostis
fruit gall Hypocreales Claviceps purpurea
flower gall Eriophyidae Aceria cornuta
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf film Ustilaginales Tranzscheliella hypodytes
leaf gall Eriophyidae Abacarus hystrix
leaf gall Eriophyidae Aceria tenuis
leaf miner Agromyzidae Cerodontha incisa
leaf miner Agromyzidae Cerodontha superciliosa
leaf miner Elachistidae Elachista argentella
leaf miner Elachistidae Elachista littoricola
leaf pustule uredinia telia Pucciniales Puccinia actaeae-elymi
leaf pustule uredinia telia Pucciniales Puccinia coronata
leaf pustule uredinia telia Pucciniales Puccinia elymi
leaf pustule Urocystidales Urocystis agropyri
leaf stripe Microbotryales Ustilentyloma brefeldii
leaf stripe uredinia telia Pucciniales Puccinia striiformis
leaf stripe Ustilaginales Ustilago serpens
leaf stripe Ustilaginales Ustilago striiformis
stem gall Eurytomidae Tetramesa brischkei
stem vagrant Aphididae Laingia psammae
root gall Anguinidae Subanguina radicicola
inquiline Eriophyidae Aculodes dubius
leaf vagrant Aphididae Atheroides hirtellus
leaf vagrant Aphididae Atheroides serrulatus
leaf vagrant Aphididae Sipha glyceriae
leaf vagrant Aphididae Sipha arenarii
leaf vagrant Aphididae Schizaphis rufula

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 14.x.2019