Plant Parasites of Europe

leafminers, galls and fungi

Thymus praecox

mother of thyme

synonym: Thymus humifusus

organ parasitic mode stage note taxonomic group parasite
leaf pustule aecia Pucciniales Puccinia thymi
leaf pustule telia Pucciniales Puccinia schneideri
root vagrant Noctuidae Agrotis cinerea
leaf vagrant Zygaenidae Zygaena purpuralis
flower vagrant Geometridae Eupithecia distinctaria
leaf vagrant Lycaenidae Pseudophilotes baton
leaf vagrant Tingidae Lasiacantha capucina
leaf vagrant Crambidae Pyrausta cingulata
leaf vagrant Cicadellidae Chlorita dumosa
flower hidden Thripidae Thrips flavus
flower borer Nitidulidae Thymogethes acicularis
flower borer Nitidulidae Thymogethes funereus
root vagrant Chrysomelidae Longitarsus obliteratoides
leaf scale Pseudococcidae Puto pilosellae
flower vagrant Pterophoridae Merrifieldia tridactyla
leaf bud inquiline Eriophyidae Aculops thymi
leaf bud gall Eriophyidae Aceria thomasi
leaf down Erysiphales Golovinomyces monardae
leaf miner Coleophoridae Coleophora niveicostella
leaf miner Coleophoridae Coleophora serpylletorum
leaf pustule telia Pucciniales Puccinia thymi


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 14.xii.2021