groundsel

organ parasitic mode stage note taxonomic group parasite
leaf vagrant summer generation Aphididae Aphis fabae fabae
leaf miner Agromyzidae Chromatomyia horticola
leaf vagrant Aphididae Aulacorthum solani
leaf bud gall Eriophyidae Aceria leioprocta
leaf vagrant summer generation Aphididae Brachycaudus helichrysi
leaf vagrant summer generation Aphididae Aphis fabae solanella
systemic borer Anguinidae Ditylenchus dipsaci
flower borer Tephritidae Trupanea stellata
flower gall Cecidomyiidae Contarinia jacobaeae
flower gall Tephritidae Sphenella marginata
leaf down Erysiphales Golovinomyces fischeri
leaf down Erysiphales Podosphaera senecionis
leaf down Peronosporales Bremia tulasnei
leaf gall Aphididae Aphis jacobaeae
leaf miner Agromyzidae Chromatomyia syngenesiae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Curculionidae Orthochaetes insignis
leaf miner Tephritidae Trypeta zoe
leaf pustule Albuginales Pustula obtusata
leaf pustule Chytridiales Synchytrium aureum
leaf pustule Chytridiales Synchytrium globosum
leaf pustule aecia Pucciniales Puccinia opizii
leaf pustule aecia Pucciniales Puccinia schoeleriana
leaf pustule aecia Pucciniales Puccinia senecionis-acutiformis
leaf pustule aecia telia main Pucciniales Puccinia lagenophorae
leaf pustule uredinia telia Pucciniales Coleosporium senecionis
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant Triozidae Bactericera nigricornis
leaf vagrant summer generation Aphididae Myzus persicae
leaf vagrant summer generation Aphididae Brachycaudus cardui
leaf vagrant Aphididae Aulacorthum circumflexum
leaf vagrant Aphididae Macrosiphum euphorbiae
root collar vagrant Aphididae Brachycaudus lateralis

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.

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 22.i.2019