welted thistle

organ parasitic mode stage note taxonomic group parasite
stem borer larva Curculionidae Lixus pulverulentus
leaf miner Depressariidae Agonopterix arenella
flower gall larva Curculionidae Larinus planus
unknown borer doubtful Syrphidae Cheilosia mutabilis
stem borer Syrphidae Cheilosia cynocephala
root collar borer Syrphidae Cheilosia albipila
root collar borer Syrphidae Cheilosia grossa
unknown borer larva Curculionidae Hadroplontus trimaculatus
flower gall Curculionidae Rhinocyllus conicus
stem borer larva Curculionidae Lixus filiformis
flower borer larva Curculionidae Larinus sturnus
flower borer larva Curculionidae Larinus iaceae
leaf vagrant summer generation Aphididae Brachycaudus cardui
leaf vagrant summer generation Aphididae Aphis fabae fabae
stem borer Agromyzidae Melanagromyza aeneoventris
systemic borer Anguinidae Ditylenchus dipsaci
flower borer Tephritidae Tephritis hyoscyami
flower borer Tephritidae Terellia winthemi
flower gall Microbotryales Microbotryum cardui
flower gall Tephritidae Urophora solstitialis
leaf borer Tephritidae Xyphosia miliaria
leaf down Erysiphales Golovinomyces montagnei
leaf down Erysiphales Leveillula lappae
leaf down Peronosporales Bremia lactucae
leaf miner Agromyzidae Chromatomyia syngenesiae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Phytomyza cirsii
leaf miner Agromyzidae Phytomyza cirsiophaga
leaf miner Agromyzidae Phytomyza continua
leaf miner Agromyzidae Phytomyza spinaciae
leaf miner Anthomyiidae Pegomya steini
leaf miner Choreutidae Tebenna micalis
leaf miner Depressariidae Agonopterix subpropinquella
leaf miner Gelechiidae Scrobipalpa acuminatella
leaf miner Sciaridae Phytosciara halterata
leaf miner Sciaridae Phytosciara macrotricha
leaf pustule uredinia telia Pucciniales Puccinia carduorum
leaf vagrant summer generation Aphididae Aphis fabae
stem vagrant Aphididae Uroleucon aeneum
leaf vagrant Aphididae Capitophorus carduinus


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 13.iii.2020