six-rowed barley

synonym: Hordeum hexastichum, sativum, tetrastichum

organ parasitic mode stage note taxonomic group parasite
stem vagrant Aphididae Laingia psammae
fruit gall Hypocreales Fusarium graminearum
leaf vagrant Eriophyidae Aceria tosichella
leaf vagrant Aphididae Schizaphis graminum
leaf vagrant summer generation Aphididae Melanaphis pyraria
root vagrant summer generation Aphididae Paracletus cimiciformis
root vagrant summer generation Aphididae Geoica utricularia
root vagrant summer generation Aphididae Forda marginata
root vagrant Aphididae Geoica setulosa
systemic borer Anguinidae Ditylenchus dipsaci
fruit gall Hypocreales Claviceps purpurea
fruit gall Tilletiales Tilletia controversa
flower borer Cecidomyiidae Sitodiplosis mosellana
flower gall Ustilaginales Ustilago avenae
flower gall Ustilaginales Ustilago hordei
flower gall Ustilaginales Ustilago nuda
leaf miner>borer Ochsenheimeriidae Ochsenheimeria taurella
leaf miner>borer Ochsenheimeriidae Ochsenheimeria urella
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf gall Eriophyidae Abacarus hystrix
leaf gall Eriophyidae Aceria tenuis
leaf gall Peronosporales Sclerophthora macrospora
leaf miner Agromyzidae Agromyza albipennis
leaf miner Agromyzidae Agromyza ambigua
leaf miner Agromyzidae Agromyza intermittens
leaf miner Agromyzidae Agromyza luteitarsis
leaf miner Agromyzidae Agromyza megalopsis
leaf miner Agromyzidae Agromyza mobilis
leaf miner Agromyzidae Cerodontha denticornis
leaf miner Agromyzidae Cerodontha incisa
leaf miner Agromyzidae Cerodontha lateralis
leaf miner Agromyzidae Cerodontha pygmaea
leaf miner Agromyzidae Cerodontha superciliosa
leaf miner Agromyzidae Chromatomyia fuscula
leaf miner Agromyzidae Chromatomyia nigra
leaf miner Agromyzidae Liriomyza flaveola
leaf miner Agromyzidae Pseudonapomyza atra
leaf miner Agromyzidae Pseudonapomyza spinosa
leaf miner Ephydridae Hydrellia griseola
leaf pustule uredinia telia Pucciniales Puccinia graminis
leaf pustule uredinia telia Pucciniales Puccinia hordei
leaf pustule uredinia telia Pucciniales Puccinia hordei-maritimi
stem gall Cecidomyiidae Haplodiplosis marginata
stem gall Cecidomyiidae Mayetiola destructor
stem gall Chloropidae Chlorops pumilionis
root collar gall Cecidomyiidae Mayetiola hordei
root gall Meloidogynidae Meloidogyne hapla
root gall Meloidogynidae Meloidogyne naasi
root vagrant summer generation Aphididae Anoecia vagans
leaf vagrant Aphididae Sipha glyceriae
leaf vagrant Aphididae Sipha elegans
leaf vagrant summer generation Aphididae Metopolophium dirhodum
leaf vagrant Aphididae Sipha maydis
leaf vagrant summer generation Aphididae Rhopalosiphum padi
leaf vagrant Aphididae Rhopalosiphum maidis
leaf stripe Aphididae Diuraphis noxia
leaf vagrant summer generation Aphididae Sitobion fragariae
leaf vagrant Aphididae Sitobion avenae

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 7.vii.2019