organ parasitic mode stage note taxonomic group parasite
leaf vagrant Tenuipalpidae Cenopalpus officinalis
leaf vagrant Tenuipalpidae Cenopalpus adventicus
flower borer Pterophoridae Amblyptilia acanthadactyla
leaf scale Coccidae Lichtensia viburni
stem scale Coccidae Parthenolecanium corni
leaf scale Diaspididae Aspidiotus nerii
systemic scale Diaspididae Parlatoria oleae
stem scale Coccidae Saissetia oleae
leaf vagrant Tenuipalpidae Brevipalpus lewisi
leaf vagrant Aphididae Aphis gossypii
leaf vagrant summer generation Aphididae Aphis frangulae
leaf vagrant summer generation Aphididae Aphis fabae
flower gall Cecidomyiidae Dasineura rosmarini
leaf down Erysiphales Golovinomyces monardae
leaf down Erysiphales Leveillula duriaei
leaf down Erysiphales Neoërysiphe galeopsidis
leaf down doubtful Peronosporales Peronospora salviae-officinalis
leaf gall Cecidomyiidae Asphondylia rosmarini
leaf miner Cosmopterigidae Vulcaniella rosmarinella
leaf miner Nepticulidae Glaucolepis rosmarinella
stem gall Pseudomonadales Pseudomonas syringae
leaf vagrant Aphididae Macrosiphum euphorbiae
leaf gall rarely Aphididae Aphis affinis


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.


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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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.x.2019