organ parasitic mode stage note taxonomic group parasite
fruit vagrant Gelechiidae Thiotricha subocellea
stem borer larva Curculionidae Datonychus derennei
root collar borer larva Apionidae Squamapion flavimanum
leaf scale Aleyrodidae Aleyrodes lonicerae
leaf scale Aleyrodidae Asterobemisia paveli
leaf miner Agromyzidae Chromatomyia horticola
leaf vagrant summer generation Aphididae Myzus persicae
leaf vagrant Aphididae Aulacorthum solani
stem gall Asterolecaniidae Planchonia arabidis
root borer Sesiidae Chamaesphecia chalciformis
root borer Sesiidae Chamaesphecia aerifrons
leaf miner Chrysomelidae Apteropeda orbiculata
leaf vagrant Aphididae Eucarazzia elegans
systemic gall doubtful Eriophyidae Aculops hellenicus
fruit gall Cecidomyiidae Asphondylia hornigi
leaf bud gall Cecidomyiidae Blastomyia origani
leaf down Erysiphales Golovinomyces monardae
leaf down Erysiphales Neoërysiphe galeopsidis
leaf gall Aphididae Aphis origani
leaf gall Eriophyidae Aceria labiatiflorae
leaf miner Agromyzidae Phytomyza origani
leaf miner Coleophoridae Coleophora albitarsella
leaf miner doubtful Coleophoridae Coleophora pennella
leaf miner Elachistidae Stephensia brunnichella
leaf pustule aecia Pucciniales Puccinia brunellarum-moliniae
leaf pustule aecia Pucciniales Puccinia stipina
leaf pustule aecia uredinia telia Pucciniales Puccinia menthae
leaf pustule uredinia Pucciniales Caeoma origani
leaf pustule telia Pucciniales Puccinia ruebsaamenii
leaf vagrant Eriophyidae Epitrimerus jaceae
stem gall Apionidae Squamapion origani
stem gall Curculionidae Thamnurgus kaltenbachii
root vagrant summer generation Aphididae Kaltenbachiella pallida
leaf vagrant Aphididae Macrosiphum euphorbiae
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 8.viii.2019