wood ragwort

synonym: Senecio fuchsii, nemorensis subsp. fuchsii

Senecio ovatus is considered in some flora’s a junior synonym of S. nemorensis

organ parasitic mode stage note taxonomic group parasite
flower borer Pterophoridae Hellinsia osteodactylus
stem borer Syrphidae Cheilosia lenis
root collar vagrant Aphididae Brachycaudus lateralis
leaf miner Agromyzidae Liriomyza strigata
leaf vagrant summer generation Aphididae Brachycaudus helichrysi
fruit gall Anthomyiidae Botanophila seneciella
flower gall Cecidomyiidae Dasineura senecionis
flower gall Tephritidae Sphenella marginata
bud gall Cecidomyiidae Contarinia aequalis
leaf down Erysiphales Golovinomyces senecionis
leaf down Erysiphales Podosphaera senecionis
leaf down Peronosporales Bremia tulasnei
leaf gall Triozidae Trioza senecionis
leaf miner doubtful Agromyzidae Liriomyza erucifolii
leaf miner Agromyzidae Phytomyza alpina
leaf miner Agromyzidae Phytomyza senecionis
leaf miner Depressariidae Agonopterix senecionis
leaf miner Sciaridae Phytosciara halterata
leaf miner Sciaridae Phytosciara macrotricha
leaf miner Tephritidae Cornutrypeta spinifrons
leaf miner Tephritidae Stemonocera cornuta
leaf pustule aecia Pucciniales Puccinia senecionis-acutiformis
leaf pustule uredinia telia Pucciniales Coleosporium senecionis
leaf pustule telia Pucciniales Puccinia expansa
leaf pustule telia Pucciniales Puccinia senecionis
leaf pustule telia Pucciniales Puccinia uralensis
stem gall Pterophoridae Platyptilia nemoralis
flower vagrant Aphididae Aphis cacaliasteris
leaf vagrant Aphididae Macrosiphum alpinum
leaf vagrant summer generation Aphididae Brachycaudus cardui


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.


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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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 10.ix.2019