organ parasitic mode stage note taxonomic group parasite
leaf vagrant summer generation Aphididae Dysaphis lauberti
leaf vagrant summer generation Aphididae Cavariella theobaldi
root collar vagrant summer generation Aphididae Anuraphis subterranea
stem borer Agromyzidae Melanagromyza chaerophylli
stem borer Agromyzidae Melanagromyza nigrissima
stem miner Agromyzidae Ophiomyia bohemica
systemic gall Eriophyidae Epitrimerus anthrisci
leaf down Erysiphales Erysiphe heraclei
leaf gall Cecidomyiidae Macrolabis heraclei
leaf miner Agromyzidae Phytomyza heracleana
leaf miner doubtful Agromyzidae Phytomyza spondylii
leaf miner Tephritidae Euleia heraclei
leaf pustule aecia Pucciniales Puccinia nitidula
leaf pustule aecia Pucciniales Uromyces graminis
leaf pustule aecia uredinia telia Pucciniales Puccinia heraclei
leaf vagrant Eriophyidae Epitrimerus heraclei
root collar vagrant Aphididae Dysaphis newskyi
leaf gall Aphididae Paramyzus heraclei
leaf vagrant summer generation Aphididae Cavariella archangelicae
leaf vagrant summer generation main Aphididae Cavariella pastinacae

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.iv.2018