organ parasitic mode stage note taxonomic group parasite
leaf miner younger larva Tortricidae Cnephasia asseclana
leaf hidden older larva Tortricidae Cnephasia asseclana
leaf hidden Tortricidae Sparganothis pilleriana
leaf hidden Tortricidae Lozotaenia forsterana
leaf hidden Tortricidae Acleris variegana
leaf miner Agromyzidae Liriomyza strigata
leaf vagrant Aphididae Sitobion avenae
leaf vagrant summer generation Aphididae Brachycaudus cardui
leaf scale Diaspididae Aspidiotus nerii
stem scale Diaspididae Diaspidiotus cecconii
leaf vagrant Aphididae Aulacorthum solani
root collar vagrant rarely Aphididae Dysaphis foeniculus
systemic gall doubtful Eriophyidae Aceria destructor
systemic gall Eriophyidae Cecidophyes glaber
flower vagrant Aphididae Aphis sedi
leaf miner>borer Apionidae Aizobius sedi
leaf down Erysiphales Erysiphe sedi
leaf down Erysiphales Golovinomyces orontii
leaf miner Agromyzidae Liriomyza bryoniae
leaf miner Agromyzidae Phytomyza sedi
leaf miner Agromyzidae Phytomyza sedicola
leaf miner Glyphipterigidae Glyphipterix equitella
leaf miner Syrphidae Cheilosia semifasciata
leaf miner Yponomeutidae Yponomeuta sedella
leaf pustule aecia Pucciniales Puccinia australis
leaf pustule aecia Pucciniales Puccinia longissima
leaf pustule aecia Pucciniales Puccinia triseti
leaf pustule aecia telia Pucciniales Uromyces sedi
leaf pustule telia Pucciniales Puccinia sedi
stem gall Asterolecaniidae Planchonia arabidis
stem gall Nanophyidae Pericartiellus flavidus
stem gall Nanophyidae Pericartiellus telephii
root collar gall Actinomycetales Rhodococcus fascians
root gall Meloidogynidae Meloidogyne hapla
stem vagrant Aphididae Aphis craccivora
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant summer generation Aphididae Aphis nasturtii
leaf vagrant Aphididae Nasonovia dasyphylli
leaf vagrant Aphididae Aphis spiraecola
stem gall rarely Aphididae Brachycaudus sedi
leaf vagrant Aphididae Aphis gossypii

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 12.xi.2019