Plant Parasites of Europe

leafminers, galls and fungi

Lolium temulentum


synonym: Lolium arvense

organ parasitic mode stage note taxonomic group parasite
flower hidden Thripidae Chirothrips aculeatus
leaf vagrant Nymphalidae Arethusana arethusa
leaf vagrant Noctuidae Eremobia ochroleuca
leaf vagrant Nymphalidae Brintesia circe
leaf vagrant Eriophyidae Aceria tosichella
leaf vagrant summer generation Aphididae Rhopalosiphum padi
flower gall Tilletiales Tilletia lolii
flower gall Ustilaginales Ustilago lolii
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf film doubtful Ustilaginales Tranzscheliella hypodytes
leaf gall Peronosporales Sclerophthora macrospora
leaf pustule uredinia telia Pucciniales Puccinia graminis
leaf stripe uredinia telia Pucciniales Puccinia striiformis
leaf vagrant Aphididae Sipha maydis


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 8.x.2023