Plant Parasites of Europe

leafminers, galls and fungi

Silaum silaus


synonym: Silaum flavescens; Silaus besseri, flavescens, pratensis

organparasitic modestagenotetaxonomic groupparasite
leafvagrantPentatomidaeGraphosoma italicum
leafvagrantNoctuidaeMelanchra persicariae
leafvagrantNoctuidaeEucarta amethystina
flowervagrantGeometridaeEupithecia centaureata
leafhiddenDepressariidaeAgonopterix ciliella
flowerhiddenElachistidaeDepressaria depressana
flowerhiddenTortricidaePammene gallicana
stemborerAgromyzidaeMelanagromyza nibletti
fruitgallCecidomyiidaeKiefferia pericarpiicola
flowergallCecidomyiidaeLasioptera carophila
flowergallCecidomyiidaeMacrolabis laserpitii
leafdownErysiphalesErysiphe heraclei
leafdownErysiphalesLeveillula braunii
leafdownPeronosporalesPlasmopara silai
leafgallCecidomyiidaeJaapiella dittrichi
leafminerdoubtfulAgromyzidaePhytomyza adjuncta
leafminerAgromyzidaePhytomyza silai
leafpustuleBlastocladialesPhysoderma vagans
leafpustuleChytridialesSynchytrium aureum
leafpustuleuredinia teliaPuccinialesPuccinia silai
leafvagrantsummer generationAphididaeHyadaphis foeniculi


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 23.i.2022