narrow-leaved hawk’s-beard

organ parasitic mode stage note taxonomic group parasite
stem vagrant Aphididae Uroleucon cichorii
systemic borer Anguinidae Ditylenchus dipsaci
flower borer Tephritidae Trupanea stellata
flower gall Eriophyidae Aceria rechingeri
leaf down Erysiphales Podosphaera erigerontis-canadensis
leaf down Peronosporales Bremia lactucae
leaf leaf spot Entylomatales Entyloma crepidis-tectori
leaf leaf spot Entylomatales Entyloma zacintha
leaf miner Agromyzidae Liriomyza strigata
leaf pustule aecia uredinia telia Pucciniales Puccinia crepidis
leaf pustule aecia uredinia telia Pucciniales Puccinia crepidis-blattarioidis
leaf pustule aecia uredinia telia Pucciniales Puccinia crepidis-grandiflorae
leaf pustule uredinia telia Pucciniales Coleosporium sonchi
leaf pustule uredinia telia Pucciniales Puccinia crepidicola
leaf vagrant summer generation Aphididae Nasonovia ribisnigri
root collar vagrant Aphididae Aphis crepidis
flower vagrant Aphididae Uroleucon riparium
stem vagrant Aphididae Uroleucon grossum

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 23.i.2018