organ parasitic mode stage note taxonomic group parasite
leaf hidden Tortricidae Cnephasia incertana
flower hidden Tortricidae Eupoecilia cebrana
stem borer Tortricidae Cochylidia implicitana
root collar borer Tortricidae Aethes williana
flower borer Pterophoridae Hellinsia distinctus
stem borer younger larva Pterophoridae Platyptilia tesseradactyla
leaf vagrant older larva Pterophoridae Platyptilia tesseradactyla
leaf vagrant summer generation Aphididae Aphis fabae fabae
stem vagrant Aphididae Aphis craccivora
leaf vagrant summer generation Aphididae Aphis fabae
systemic borer Anguinidae Ditylenchus dipsaci
flower gall summer generation Tephritidae Actinoptera discoidea
leaf bud gall spring generation Tephritidae Actinoptera discoidea
leaf down Erysiphales Neoerysiphe gnaphalii
leaf leaf spot Entylomatales Entyloma magnusii
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Liriomyza trifolii
leaf miner Agromyzidae Ophiomyia gnaphalii
leaf miner Agromyzidae Phytomyza hedingi
leaf miner Agromyzidae Phytomyza kyffhusana
leaf miner Bucculatricidae Bucculatrix gnaphaliella
leaf miner Choreutidae Tebenna micalis
leaf miner Coleophoridae Coleophora caelebipennella
leaf miner Coleophoridae Coleophora gnaphalii
leaf miner Curculionidae Orthochaetes insignis
leaf miner doubtful Gelechiidae Scrobipalpula diffluella
leaf miner Gelechiidae Scrobipalpula psilella
leaf miner Glyphipterigidae Digitivalva reticulella
leaf pustule Albuginales Pustula obtusata
leaf vagrant summer generation Aphididae Brachycaudus helichrysi
stem gall Apionidae Acentrotypus brunnipes
stem gall Tortricidae Eucosma albidulana
root gall Meloidogynidae Meloidogyne hapla
root vagrant summer generation Aphididae Pemphigus populinigrae
leaf vagrant summer generation Aphididae Brachycaudus helichrysi
leaf vagrant Aphididae Pleotrichophorus filaginis
leaf vagrant Aphididae Myzus ornatus

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 11.xi.2019