Plant Parasites of Europe

leafminers, galls and fungi

Tripleurospermum maritimum

sea mayweed

synonym: Matricaria maritima

organ parasitic mode stage note taxonomic group parasite
leaf vagrant Miridae Plagiognathus chrysanthemi
leaf vagrant Miridae Adelphocoris lineolatus
leaf vagrant Miridae Closterotomus norwegicus
leaf vagrant Miridae Phytocoris varipes
leaf vagrant Miridae Lygus maritimus
fruit vagrant Lygaeidae Nysius graminicola
fruit vagrant Lygaeidae Emblethis denticollis
fruit vagrant Lygaeidae Metopoplax fuscinervis
fruit vagrant Lygaeidae Metopoplax ditomoides
leaf vagrant Miridae Conostethus venustus
flower vagrant Noctuidae Cucullia chamomillae
leaf vagrant Cixiidae Pentastiridius leporinus
stem borer Tortricidae Cochylidia implicitana
flower borer larva Curculionidae Pseudostyphlus pillumus
leaf miner Agromyzidae Chromatomyia horticola
flower borer Tephritidae Trupanea stellata
leaf down Erysiphales Golovinomyces macrocarpus
leaf down Peronosporales Paraperonospora leptosperma
leaf down Peronosporales Peronospora radii
leaf leaf spot Entylomatales Entyloma matricariae
leaf miner Agromyzidae Phytomyza pullula
leaf pustule uredinia telia Pucciniales Puccinia balsamitae
stem borer Agromyzidae Napomyza lateralis
unknown unknown Agromyzidae Liriomyza intonsa
leaf vagrant Aphididae Myzus cymbalariae
root collar vagrant Aphididae Aphis lindae


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.


Last modified 22.iv.2022