smooth hawk’s-beard

organ parasitic mode stage note taxonomic group parasite
flower borer larva Curculionidae Glocianus distinctus
leaf vagrant Aphididae Myzus ornatus
leaf vagrant summer generation Aphididae Aphis nasturtii
leaf vagrant summer generation Aphididae Aphis fabae solanella
systemic borer Anguinidae Ditylenchus dipsaci
flower gall Eriophyidae Aceria rechingeri
flower gall rarely Tephritidae Tephritis formosa
leaf borer Agromyzidae Ophiomyia beckeri
leaf down Erysiphales Golovinomyces cichoracearum
leaf down Erysiphales Podosphaera erigerontis-canadensis
leaf down Peronosporales Bremia lactucae
leaf leaf spot Capnodiales Didymaria matricariae
leaf leaf spot Entylomatales Entyloma crepidis-rubrae
leaf miner Agromyzidae Liriomyza endiviae
leaf miner Agromyzidae Liriomyza strigata
leaf pustule aecia Pucciniales Puccinia opizii
leaf pustule aecia uredinia telia main Pucciniales Puccinia crepidis
leaf pustule aecia uredinia telia Pucciniales Puccinia crepidis-blattarioidis
leaf pustule aecia uredinia telia Pucciniales Puccinia praecox
leaf pustule uredinia telia Pucciniales Puccinia crepidicola
stem borer Agromyzidae Napomyza lateralis
root collar gall Cynipidae Timaspis lusitanica
leaf vagrant summer generation Aphididae Nasonovia ribisnigri
stem vagrant Aphididae Uroleucon cichorii
root collar vagrant Aphididae Aphis crepidis
leaf vagrant Aphididae Aphis spiraecola
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 5.vi.2019