heath speedwell

organ parasitic mode stage note taxonomic group parasite
unknown borer larva Curculionidae Gymnetron pyrenaicum
unknown borer larva Curculionidae Gymnetron rostellum
leaf leaf spot incertae sedis Discogloeum veronicae
systemic gall Cecidomyiidae Dasineura similis
flower gall incertae sedis Schroeteria delastrina
leaf bud gall Cecidomyiidae Jaapiella veronicae
leaf bud gall Eriophyidae Aceria anceps
leaf down Erysiphales Podosphaera fuliginea
leaf down Peronosporales Peronospora grisea
leaf leaf spot Entylomatales Entyloma veronicae
leaf miner Agromyzidae Phytomyza crassiseta
leaf miner Agromyzidae Phytomyza veronicicola
leaf pustule telia Pucciniales Puccinia veronicarum
leaf vagrant summer generation Aphididae Nasonovia ribisnigri
stem gall Asterolecaniidae Planchonia arabidis
stem gall Curculionidae Gymnetron aper
stem gall Curculionidae Gymnetron melanarium

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 2.v.2019