rough hawk’s-beard

synonym: Crepis tristis

organ parasitic mode stage note taxonomic group parasite
flower borer larva Curculionidae Glocianus distinctus
stem borer larva main Curculionidae Lixus punctiventris
leaf miner Curculionidae Orthochaetes setiger
flower vagrant summer generation Aphididae Hyperomyzus picridis
leaf leaf spot Capnodiales Ramularia inaequalis
stem borer Agromyzidae Melanagromyza oligophaga
systemic borer Anguinidae Ditylenchus dipsaci
flower borer Tephritidae Ensina sonchi
flower borer Tephritidae Tephritis crepidis
flower gall Cecidomyiidae Contarinia hypochoeridis
flower gall Eriophyidae Aceria rechingeri
flower gall Tephritidae Noeeta crepidis
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 gall Taphrinales Protomyces crepidicola
leaf miner Agromyzidae Liriomyza endiviae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Phytomyza marginella
leaf miner Agromyzidae Phytomyza robustella
leaf miner Curculionidae Orthochaetes insignis
leaf pustule Chytridiales Synchytrium aureum
leaf pustule Chytridiales Synchytrium taraxaci
leaf pustule aecia Pucciniales Puccinia opizii
leaf pustule aecia rarely Pucciniales Puccinia silvatica
leaf pustule aecia uredinia telia Pucciniales Puccinia crepidis
leaf pustule aecia uredinia telia main Pucciniales Puccinia praecox
leaf vagrant summer generation Aphididae Nasonovia ribisnigri
root collar gall Cynipidae Timaspis lusitanica
root vagrant Aphididae Trama troglodytes
root collar vagrant Aphididae Aphis crepidis
stem vagrant Aphididae Uroleucon grossum
flower gall rarely Aphididae Uroleucon hypochoeridis

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.

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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 2.vii.2019