Plant Parasites of Europe

leafminers, galls and fungi

Mercurialis annua

annual mercury

synonym: Mercurialis ambigua

organ parasitic mode stage note taxonomic group parasite
leaf vagrant adult Curculionidae Tropiphorus elevatus
leaf vagrant Curculionidae Laparocerus junonius
leaf vagrant Curculionidae Laparocerus roudieri
leaf vagrant Curculionidae Laparocerus rasus
flower hidden Aeolothripidae Melanthrips fuscus
flower hidden Aeolothripidae Melanthrips knechteli
leaf leaf spot Mycosphaerellaceae Cercospora mercurialis
flower vagrant Miridae Closterotomus trivialis
leaf pustule aecia Pucciniales Aecidium marcii
leaf vagrant Erebidae Ocnogyna baetica
leaf vagrant Sphingidae Hyles euphorbiae
unknown unknown doubtful Chrysomelidae Psylliodes stolida
root vagrant Chrysomelidae Hermaeophaga cicatrix
leaf scale Aleyrodidae Aleyrodes elevatus
leaf down Erysiphales Leveillula chrozophorae
leaf miner Agromyzidae Liriomyza bryoniae
leaf pustule aecia Pucciniales Melampsora populnea
leaf pustule aecia Pucciniales Melampsora pulcherrima
leaf pustule aecia Pucciniales Puccinia cynodontis
leaf pustule aecia Pucciniales Puccinia isiacae
leaf vagrant Aphididae Aulacorthum solani
stem gall Apionidae Kalcapion semivittatum


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.


To filter the table above, add a text to the search field (top right of the table).
To sort a column click on an arrow after the column name (both ascending and descending).
Sort multiple columns with Shift + click on the arrows.


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.


Last modified 30.xii.2023