annual meadowgrass

synonym: Poa annua

organ parasitic mode stage note taxonomic group parasite
leaf vagrant Aphididae Diuraphis agrostidis
leaf miner older larva Coleophoridae Coleophora lixella
stem borer Anthomyiidae Delia coarctata
root vagrant summer generation Aphididae Forda marginata
leaf vagrant Aphididae Schizaphis graminum
root vagrant summer generation Aphididae Forda formicaria
systemic borer Anguinidae Ditylenchus dipsaci
flower gall Anguinidae Anguina agrostis
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf leaf spot Georgefischeriales Jamesdicksonia dactylidis
leaf leaf spot Georgefischeriales Jamesdicksonia irregularis
leaf gall Eriophyidae Abacarus hystrix
leaf miner Agromyzidae Cerodontha muscina
leaf miner Agromyzidae Chromatomyia fuscula
leaf miner Agromyzidae Chromatomyia milii
leaf miner Agromyzidae Chromatomyia nigra
leaf miner Agromyzidae Liriomyza flaveola
leaf miner Agromyzidae Liriomyza graminivora
leaf miner doubtful Elachistidae Elachista consortella
leaf miner Elachistidae Elachista freyerella
leaf miner Elachistidae Elachista pullicomella
leaf pustule uredinia telia Pucciniales Puccinia poae-nemoralis
leaf pustule uredinia telia Pucciniales Puccinia poarum
leaf pustule uredinia telia Pucciniales Uromyces poae
leaf stripe uredinia telia Pucciniales Puccinia pseudostriiformis
leaf stripe Urocystidales Urocystis poae
leaf stripe Ustilaginales Ustilago striiformis
stem gall Chloropidae Oscinella frit
stem gall Chloropidae Oscinella nitidissima
root gall Anguinidae Subanguina radicicola
root vagrant summer generation Aphididae Aploneura lentisci
inquiline Eriophyidae Aculodes dubius
leaf vagrant Aphididae Atheroides serrulatus
leaf vagrant Aphididae Sipha glyceriae
leaf vagrant summer generation Aphididae Melanaphis pyraria
leaf vagrant Aphididae Sipha elegans
leaf vagrant Aphididae Sipha maydis
leaf vagrant summer generation Aphididae Utamphorophora humboldti
root collar vagrant summer generation Aphididae Rhopalomyzus poae
leaf vagrant Aphididae Aulacorthum circumflexum
leaf vagrant summer generation Aphididae Sitobion fragariae
leaf vagrant rarely Aphididae Schizaphis agrostis
leaf vagrant summer generation Aphididae Rhopalosiphum padi
leaf vagrant Aphididae Schizaphis palustris
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 11.xii.2018