organ parasitic mode stage note taxonomic group parasite
leaf miner Curculionidae Orthochaetes setiger
stem gall Cynipidae Aulacidea hieracii
leaf leaf spot Capnodiales Ramularia inaequalis
leaf vagrant summer generation Aphididae Aphis fabae
leaf gall Aphididae Aphis hieracii
root collar vagrant rarely Aphididae Aphis pilosellae
stem miner Agromyzidae Ophiomyia heringi
flower borer Tephritidae Trupanea stellata
flower gall Cecidomyiidae Jaapiella compositarum
flower gall Pterophoridae Hellinsia didactylites
flower gall Tephritidae Noeeta pupillata
leaf bud gall Cecidomyiidae Macrolabis hieracii
leaf down Erysiphales Golovinomyces cichoracearum
leaf down Erysiphales Podosphaera erigerontis-canadensis
leaf down Peronosporales Bremia lactucae
leaf leaf spot Entylomatales Entyloma hieracii
leaf gall Aphididae Nasonovia compositellae
leaf gall Cecidomyiidae Cystiphora sanguinea
leaf gall Eriophyidae Aceria longiseta
leaf gall Eriophyidae Eriophyes villificus
leaf miner Agromyzidae Liriomyza hieracii
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Phytomyza marginella
leaf miner Curculionidae Orthochaetes insignis
leaf miner Tephritidae Trypeta immaculata
leaf pustule uredinia telia Pucciniales Puccinia hieracii
leaf gall Aphididae Nasonovia compositellae nigra
leaf gall Aphididae Nasonovia pilosellae
leaf vagrant summer generation Aphididae Nasonovia ribisnigri
stem vagrant Aphididae Hyperomyzus hieracii
leaf vagrant Aphididae Acyrthosiphon malvae
stem vagrant Aphididae Uroleucon obscurum
root collar vagrant Aphididae Aphis pilosellae

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 14.v.2019